Those who are Ambisextrous (male or female) can switch hands on the fly, virtually eliminating the problem of cramping altogether.
This creates a more efficient self-pleasuring experience in general.
Ambisexterity is a highly regarded trait- said to only be held by the most skilled of masturbaters.
"Damn. Sounds like a god."
Also a play on the word "ambidextrous" - one who uses either his right or left hand.