She may look like the girl of your dreams, but if you paid attention at all during the movie you’d know what a nightmare she’d become after the honeymoon period ended. Don’t fall into that trap. But just because you’re not bringing her home to mama, doesn’t mean you shouldn’t bring her home at all. Here are the 10 biggest on-screen crushes that come with the biggest red flags.

10) Lara Croft (Tomb Raider)

Why you shouldn’t get attached: She is way too adventurous to keep up with. I mean some girls like surfing, hiking or if they want to get nuts, sky diving. This chick uses sky diving as a form of transportation and gets her rocks off burrowing under thousand ton rocks. You’d have a stroke before the second date.

What the one-night stand could be like: With all those “toys” around her place, I’m sure some stuff is just for fun. Starting with the bungee cord. And the icing on the cake? There’s a limo waiting for you when you leave in the morning (not during the night, don’t be a jerk. She has guns).

How to get your shot: Lara has refined taste. She likes rare things. So be unique. Show her you have a talent most people don’t. If you catch her during a drought or while she’s high off of a great discovery, you’re in business!

9) Mystique (X-Men)

Why you shouldn’t get attached: She’s f—in’ blue! I’m not trying to be racist here but…no, you know what, I am. I don’t like blue people. I don’t want powder blue children. There, I said it.

What the one-night stand could be like: She can turn into any woman you want. Even during.

How to get your shot: Show up at a mutant rally and get involved. But don’t harass her, in fact ignore her. Put all your passion into the rally and make a scene. She’ll notice.

8) Mikaela Banes (Transformers)

Why you shouldn’t get attached: She’s a leech. She’s got nothing going for herself and gets really clingy during life and death struggles. You’d have to carry the entire relationship.

What the one-night stand could be like: We’re talking about a dirty, greasy, steamy night on the hood of one of the hottest cars on the planet (hopefully not the transformers though, that would be weird)…in the rain.

How to get your shot: She respects a guy that’s good with his hands, so fix something. Like a feud between warring aliens or a table leg, whatever your specialty is. Or just build a highly detailed model car, custom made for her.

7) Diana Guzman (Girlfight)

Why you shouldn’t get attached: Aside from the fact that you could become a victim of domestic violence, why would you want to kiss Ms. Lumpy-Face every couple of months?

What the one-night stand could be like: She’ll throw you on the bed, force herself on top and pull your hair for a change.

How to get your shot: Rescue her. Not from a fight, but an argument. If some guy relentlessly hits on her, some hostess won’t give her a table or she can’t pay a cashier because she left her man-bag…purse in the car, step in and do something. Even a warrior princess want a guy who has her back.

6) Selene (Underworld)

Why you shouldn’t get attached: She’s been alive over a century and still hasn’t let go of her emotion baggage. She won’t forget a single mistake you make. And her friends suck ass.

What the one-night stand could be like: Woman aren’t the only ones hot for vampires. Who doesn’t like a playful bite every now and again? Only Selene’s comes with a mind blowing flashback sequence!

How to get your shot: Cut yourself. Down there. I didn’t say deep.

5) Charlie’s Angels (Charlie’s Angels)

Why you shouldn’t get attached: 3x the girls, 3x the headaches. Think Big Love type of drama, not every orgy-porn you’ve ever watched.

What the one-night stand could be like: It’s three hot women. Do I really have to explain it?

How to get your shot: The trick is to bring along two loyal wingmen and approach the ladies during a girls-night-out. Chat ‘em up, be funny, charming and then move the party back to your place. Suddenly your friends “have somewhere else to be” (after warming up the girls) and you’re sitting alone with 3 rev’d up – probably half drunk – hotties hinting at how you four can pass the time.

4) Scarlett (G.I. Joe)

Why you shouldn’t get attached: She won’t get attached. Scarlett has the emotional maturity of a soda machine. Plus, there is nothing wrong with a smart girl, but who wants to hear about quantum physics all damn day?

What the one-night stand could be like: Angle + (mass X velocity) = greatest night ever! Ms. Bowflex over here can do all the proper calculations to make sure you never forget her.

How to get your shot: Do your best Tarzan impersonation. She’ll write you off as a dumb, macho, neanderthal and thus the perfect candidate to satisfy all her scientific bodily urges without any chance of becoming a distraction to her work.

3) Stifler’s Mom (American Pie)

Why you shouldn’t get attached: She’s twice your age! Demi and Ashton aside, it’s a bad idea. Actually Demi and Ashton included.

What the one-night stand could be like: Have you ever ran a marathon? Well it will be something like that, only no one will be there to hand you Gatorade. Or maybe someone will. Cougars have no inhibitions. Bonus: You get breakfast in the morning!

How to get your shot: Help her carry in the groceries. While inside point out some other things you could help her fix. Soon enough, she’ll show you exactly what you can fix.

2) The Devil (Bedazzled)

Why you shouldn’t get attached: She’s the f—in’ devil! We all think we’ve dated the devil, but she really is Satan. How would you explain that to your mother?

What the one-night stand could be like: Hot. Probably something involving dripping candle wax, black outfits and lots of torture. Needless to say, nobodies getting their wings afterward.

How to get your shot: Really? You want to horizontal dance with the devil? Okay. Play the angel. Remember, when the devil was cast out of heaven she vowed to lore man down with her. Bad girls operate the same way.

1) Catwoman (Catwoman)

Why you shouldn’t get attached: She will stray. Oh and that pointy-eared guy she’s always flirting with could kick the crap out of you. And do I even need to mention all the creepy cats?

What the one-night stand could be like: She carries around a whip for crying out loud. Add to that she has nine lives. I’m just saying.

How to get your shot: Just be around when she’s in heat. The girl is a serial cheater. Hello.