I’m not sure what you mean by sexually attracted here. Even a threat can provoke physical signs of sexual arousal in some people. So it’s not even always a good thing.
If you mean sex as a bond-builder, it’s about more than just the sex? Seriously dude, do you have no kind of experiences with women at all?
For women who don’t have serious emotional problems, sex is usually just with a guy they can rely on and trust ie a boyfriend. A lot of these guys that ‘get laid’ and brag about it to their friends and treat women like a wank sock always look for emotionally vulnerable or trouble women for this reason. They don’t have the right intention, they can smell it like wolves and they can wash their hands of them anytime they want. I don’t even understand why anyone would want to be like that though? They are not nice people.
And also if it’s your typical idea about women being ‘mesmerized’ by a pretty boy then that can fade faster than you might think. Actually it’s the secondary attention from other women that will encourage some girls to stay close because they’ve got something that’s desired. That’s not a good thing (for the guy) when you’re not being appreciated for your inner qualities and a particular downside being if something goes wrong, no matter how colourful you are, you are just a superficial so and so that has no personality no matter what you do or say.