I had a girlfriend a few years ago that would rub my cock through my pants often in public. I do experience a lot of pre-cum when I become hard so usually when she would rub my pants a wet spot would develope on the outside of my pants and I was forced to wear it until it dried. However recently I have found myself enjoying the feel of satin panties on my cock. The way the panties keep me so tightly in place and smooth I stay hard the whole time they are on. When they come off there is always a really nice wet spot in them.