to that of a footjob ,it involves using a womans legs, maingly her calf muscles
to jerk a person to orgasm, the smooth
and silky skin of the calfs are an added pleasure for the man.
Alternatively the woman can make a sandwhich with her legs and the man will insert
his penis between
the calves back and forth until he ejaculates.
The more atheltic the woman is the better the feeling against the cock since
the calf muscles
are defined and arouse the man even