How come a guy can check out a hot girl, but If I check out a hot guy I am a sl**?

You'll never arrive if you submit or cower. For the record, you shouldn't apologize for stepping in, acknowledging what you want, and [gasp] even offering an initial handshake if it's warranted, to express yourself. Real men....and I mean, the best men, will appreciate your etiquette. I think it's a pleasant surprise that, you conduct yourself, and your body language as a class act, and NEVAH be afraid, after that initial greet?....to walk away if, after meeting the man of your attraction, turns out to be a total douche. Walking away is your best defense.
Best of luck