Stemming itself, is the act of anal sex, whilst the "receiver" has chronic, unstoppable diarrhoea, therefore "
stemming" the flow. Beware of projectile sprays, and the preparation of plastic
sheeting beforehand is a very commonly held practice.
Stemming is something beautiful that occurs between either straight couples, or gay men. It is generally the man, or the "daddy" doing the stemming, as the woman needs an extra attachment to make it work, therefore making it less popular.
Warning: Be conscious of causing an unintentional rose-bud, or pink sock. These events are widely known to be very
disconcerting.