I love my balls!!
I want to join with what has been said above about enjoying touching balls or having mine touched. Having my balls played with when I'm being sexual and turned on doesn't really do that much for me (don't turn me off, but doesn't do much either). However, I think there's something really great when a man allows another man to casually touch and caress his balls as a sign of bonding and closeness. It's where the word testify comes from, you know - man would reach inside another man's tunic and hold his balls as a signal of promise that he wasn't being dishonest.
I agree that having my balls gently fondled gives great comfort, reassurance and warmth. It shows a high level of trust as they are sensitive and could easily be crushed. So it is a perfect way of bonding between male lovers. And it is sensual, feeling a man's balls moving in my hand.
I love holding my balls, feeling the weight of them, rolling them around. I have low hangers so I get plenty of play. They aren't an erogenous zone for me so it's about "having balls is so cool!" and not sexually stimulating. It's comforting. I haven't been lucky enough to have the experience some of you have with other men caressing my balls casually, or me caressing theirs. Sounds sounds wonderfully intimate and bonding.
All men connect with their balls, and cock for that matter. But allowing a trustworthy hand to casually caress your balls while watching a game or movie is as good as the movie or game its self. It should end there. But some men want more. I guess it depends on the volume of bonding the guys have previously experienced.
And yes! Clean sweaty balls are a treat for my hand..or his.