The song, "Hitler only had one ball" was not about his testicle as many believe.
The ditty actually refers to a dogging session in 1983 when he encountered Ed Balls and Yvette Cooper in a remote lay by.
Ed was very willing and Hitler quickly did the deed, but Yvette didn't like Hitlers moustache so refused to join in.
Thus Hitler only had one Ball, in this case Ed.