tug knuckle

the highest knuckle on your hand while masterbating.....
the second joint of your thumb while making a fist ..
the same would be implied for females using artificial stimuly {viberator}

i keep banging my tug knuckle on the table
my tug knuckle is sore
you're such a tug knuckle ! ! ! !

by THE-HILBILY January 19, 2018