: my friend has an extremely large testis. One is average sized but the other is the size of a mango/a male's fist/soft ball/medium potato...gettin the picture...it's hard and it has no room to move in the sac...it's a BIG-HARD mass...Too emabarrassed to ask him about it...what could it be?...oh, he's 22 and i guess he doesn't suffer from any pain.