I'm having a hard time voting... Several of the categories really get me going, but at different times and for different reasons.

Hair color and physical attributes turn me on before I really have a chance to act, pre-coitus, or pre-foreplay.

I think you could break it down into what attracts you to a woman, what revs you up for sex (foreplay) and what makes you red-line during the act.

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"Even a man who is pure of heart
And says his prayers by night
Can become a wolf when the wolfbane blooms
And the moon is full and bright."