every so often we experience some chemical reactions inside of us that make us wish for contact with other beings of our same nature to get in the same act that serves as a way to preserve our species, and our personalities suffer subtle changes that favour that to happen
after that we return to our usual (and sometimes shyer) self until time pases and the cycle repeats
We are bound to and programmed by biology like every other animal out there! Creating healthy offspring is the highest imperative in nature and it is very deep anchored in us all. Yes we have a sentient mind and the power to, more or less, control our urges and to override the programming with other imperatives but that doesn’t change that it is still in us all and that it has power.