Its the sock used by identical twins in their teenage years that they shoot them loads into. Rather than do their own thing these identical twins split one pair of socks and have a sock each for their own personal "pleasure". Unlike the well known "posh wank" when you wank into a comdom, a Bowmer Sock wank is just like that except much poorer, well not unless you are one of the twins !

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)