If you're straight and it bothers you, why in the world would you be here in the first place. I mean, let's be realistic, the woman/man ratio is somewhat lacking, plus it's not like the women here are here just to hit on men or be hit on by men.
Personally it doesn't bother me, it's a great compliment. However, when I get a PM that speaks to nothing other than wanting to splatter various body fluids all over me, it's a little annoying.
However, even getting something that blunt from a female without at least saying "hello" first would be just as annoying. Call me old fashioned but I like a little conversation mixed into anything sexual.