K sits on a yoga ball, mostly naked, and while he flexes his abs trying to maintain his balance he also masturbates to orgasm; directly on the ball. - HfK studios, hetflexk, heteroflexible, heteroflexkblek, xdress, crossdress, cross dress, bisex, bi, gay4pay, older, mature, skinny, thin, muscular, vascular, closet, exhibitionist, amateur, straight, tranny, trans, transvestite, twunk, ecto, ectomorph, slim, veins, veiny, vein