*I vote for animal instinct. I obviously can't speak for all females, but I'll give a shot at your questions, which are valid questions in my opinion.

-why is it that the male has to step up and start the conversation with the female?
~No idea, best guess would be most girls have issues with shyness. I know I do.

-What's the best way of approaching you without looking corny?
~Don't start hitting on us right away, but do let a girl know you're interested in the first meeting. Asking for her digits usually is enough to show interest.

-What hints or clues should I look for to know if you are interested as well?
~eye contact, smiles, ...

*Hope that was helpful at least a little, Peace! :hippy:

(Stoner Females For The Win!) :thumbsup: