Its true men do have to work more for it hence why men are way more insecure than women. Women have the ease of going to any man and chatting, men don't have to feel of being judged and feeling worthless.
I've been chatted up by a quite a lot girls in my time, whenever I turn them down I always have their friends having a go at me. A girl turns down a guy, guy moves on so he doesn't look like a idiot.
women don't own sex but nor do men, the whole gender role thing is stupid if you like someone go for it doesn't make you a slut or a player if the other person wants the same.