Probably because once you ejaculate, sperm leaves your testicles so they seem empty.
Amie is right. Once u ejaculate, ur emptying ur testicles. It is normal for them to look like that. It happens to all us guys! Any other questions feel free to message me.
ok but the day after when i don't masterbate for a while or it still looks dry, scaly and i want to know how to make it look regular healthy ball sacks please tell me how?
There isn't a way, u just have to wait till they are full again.