When you take a shower and forget to wash your balls so they smell like sulfur. Often developed through extended poor hygiene habits. Similar to sulfur dick.
Boyfriend: Hey babe, can you suck on my balls while I beat my meat?
Girlfriend: YEAH Daddy I love sucking on your balls.
Boyfriend: Unzips pants, pulls pants down and BAM!
Girlfriend: Daddy I just canβt cause you have sulfur balls.
14π 1π