Everything men want to do they want to build up great pressure and then RELEASE or EXPEL it. Like weightlifting - after the grueling set comes a pause where you can rest and admire your pump. The pattern resemblances actions during coitus.
Women on the other hand want to keep something INSIDE, be it their thoughts, baby or PENIS.
Women on the other hand want to keep something INSIDE, be it their thoughts, baby or PENIS.