A person, usually a man, who enjoys and takes pleasure in the domination of "box." A knowledgeable master of all different types of "box."
Female: Oh, MattVT, you're THE boxmaster.
One who is highly trained in the art of pleasing a woman through excessive touching in the genital region.
Gena- DAAAAAAAAAMN Craig is a MACHINE in the boudoir.
Candy (dreamily) - ya he's a true boxmaster.