Slave & Dominant.
It is very sexy when you are given a body at your disposal and you do what you want with it.
You can beat it, squeeze it, caress it and play with it.
So Alex was given a slave to play with his belly.
Alex will hit the slave's belly - tense and relaxed and stretched - right in the gut!
Pick and squeeze the soft tender navel!
Stomp on the slave's belly!
And finally bring the slave to orgasm with blows to the soft belly!
Moreover - the slave will beg and plead to beat harder, because he likes it!