Most of the time I do not even realize that my balls are there just hanging down below my organ. They only hurt when I am wearing very tight jeans, usually when the jeans are new and not been washed. After that it seems to be OK. Grinding can actually feel food except when done to hard, I guess just like with breasts. Yes balls do get simulated, start feeling full, then blue balls come after an hour or so. As I am older, I get blue balls less and less, sometimes at night when I have certain dreams and wake up hard. then I ask my gal to do her thing.
Sometimes, in the movies, I do get embarrassed with my gal, when I watch a guy get racked by a woman. Seems that it is unfair that a gal can go that to a guy. Then playing co-ed sports, I am very protective of my boys, as I do not want them hurt in front of girls. Sometimes in a slow elevator, when I am with a bunch of well dressed women, I look at their breasts, think about the weakness of my balls, but that is just a fantasy of mine, that women just seem to have that sexual power over men.