The relaxation method most commonly used by men in the bathroom. The process involves Wanking and any combination of: Showering, Shitting, or Shaving. Combining the skills requires great skill and double (Two from the 'Sh...' list) and triple (three of the 'Sh....' list) shanks have been know to be fatal.
(Man returns from bathroom on night-out)
Mate: Good Shank?
Man: Yeah, just a double though - I left my razor at home.