Well.. yes.

This might be TMI, but if I try to masturbate while thinking of any random female, my vagina doesn't respond very well. If i think of those I've had crushes on before.. i respond much more.

I think part of it is the whole arousal thing.. physically your body arouses with most touches.. but your brain doesn't get as aroused, and thus affects your physical experiences.. being female, that affects how your vagina reacts and functions.