I used a wank sock everytime I masturbate so I don't have to worry about semen going anywhere else but inside the sock which saves me time that I use to spend cleaning semen off my keyboard, mouse, floor, etc...
a wank sock is used when an individual, for whatever reason decided to place an sock over his penis whilst mastubating.
it is belived to be quite common in america where women are so fridgid all a guy can do is wank in his socks. this can lead to 'cobweb cock'.
mrs tizzard: hey tizzard, whats this in your sock? ahhhh its your wank sock, sob sob