I am always surprised at how men are so candid with this type of thing. It is definitely because you are a hot chick on a bike.
This friend of mine has a really nice yellow convertible sports car and we were driving to toronto with the top down and a guy in a truck pulled up and appeared to be taking pics with his phone. She thought it was because he liked her car
Thanks babe!
... its because he thought you two had great tits.
Just saying.
I agree... what were you wearing? lol