When I'm really into someone, then the water works begin. A perfect way of knowing when I'm really into someone.
With women, I've had longer foreplay; subsequently, have had moments when the precum soaks through the boxers/undies, pants and show through my pants.
With guys, not many are into foreplay as long; so, it's rare that I have pants situations like that.
That said, there have been a couple of guys that just from talking with them have left me wet down there to my surprise when I discover my boxers feel different haha