As a man, you see a hottie, she is young/pretty/hot, thats all it takes for you to want to bang her. You dont care if she is rich or poor, if she has a degree or not, if she has lots of friends or not, if shes famous or not, if she has a good career or not, if he has good social skills, if she is captain of whatever sports team, none of that matters. She is hot, you want to bang her.

For women its different. All of that stuff matters. And the quickest way to "determine" that is social proof/pre-selection: if other girls are interested in him, he must be worth a shit. Also goes along with the strong herd mentality women have.

I've said this before and probably need to make it into a full post. But Pre-selection is actually just females competing against each other to prove who's the better fuck/more desirable. It's not just about the approval you get from already having a girl. It's innate female competition.

I relate it to when I see a super fine girl with a twig, and I think to myself, "I could pound that girl into next week like you never have kiddo." I don't know this guy. He could be cool as fuck for all I know. But that's my initial impression.

Well women have first impressions too. "He got a girl like her? What's he have? How's my SMV in relation to hers? I bet I can get him to look at me with 'fuck-me' eyes. I bet I could ride his dick better than her. Wow, she can't even dance. I'd be better off with him. Look at how ugly those shoes are.. He should get with someone with good class and fashion sense like me." And so on and so forth...

Actually motivations could be a couple of different reasons depending on the girl.

1) Girls are attracted sometimes when they know that a man has options or is wanted by other women.

2) But honestly sometimes it is because the girl gets the feeling that you are not there running game on her to get in her pants....so she can let her shields down thinking that there isn't any risk because your focus is on your GF.

That is the read which has to be decoded. Is she actually chasing you or is she just more relaxed?

First of all, preselection.

Second of all, women's competetive nature.

It's not that she's "enticed," it's just that she feels safer and more comfortable socializing with you because she doesn't feel like she needs to keep her guard up to deflect unwanted advances. She expects that you're not going to hit on her since you already have a girlfriend, so she can relax and simply enjoy your company.

I furnishes them with lots of plausible deniability/anti-slut defense. "eww gross, I wasn't flirting. he's got a girlfriend."

1. Makes you a challenge. Nobody likes a game that's too easy.

The two basic reasons are social validation and presumed sincerity. If you have a girlfriend (particularly a good looking one) then other women (and men) assume you have a higher value. Secondly, if you talk with or even fllirt with women who know you have a girlfriend, they are not immediately on guard abiut you being friendly just to get in their pants because you are already getting it from your GF.

There can be a darker side to this if they have the "homewrecker" mentality.

Women love competition. Abundance, or at least the illusion of abundance, is incredibly important. Chicks don't want some creepy loser who is going to go gaga after them, they want to see if they can fuck the dude who is worth locking down.

Its simple. Women want men that other women want.