Totally agree with Electronips. Not only the feeling of the weights tugging on my shit, but the bouncing and thrusting up against my thin material shorts making their obvious play for attention, is pretty damn erotic. I work out naked at home and pretty much always have weights on as well. After all this time I still enjoy seeing myself between sets as I stretch in front of my mirrors and watching my nuts bounce and move around like crazy. My main goal though, is not the feeling or sight of it, but the fact that it is helping me stretch my sack for a better hang.