What is it with guys???

I'm a well built gal with a great body, bright smile and well very much single, i'd just like to know what it is with guys when i walk down the street they make pes at me and that's where it pretty much ends! I'd really like a guy to approah me and just talk to me, i don't bite in public unless he wants me to (just joking)! I've never blown off a guy rudely in my life so what is it?!?