A perverse and often misunderstood act of sexual deviancy - When a consenting couple plan to copulate in the near future, they prepare for the act of intercourse by passing faeces into a condom. Once safely inside the condom, the faecal matter is drawn into a needleless syringe. Replacing the needle, the stool is injected into the epidermis and left for three days. Once the faecal matter has caused a minor infection, and the blister is deemed 'ripe', the lovers are ready. Copulating in the position commonly known as "doggy-style" when one partner reaches climax, he/she bites into the "shitblister", orgasming while his/her mouth is filled with their own faeces and a substantial quantity of puss from their lover's body's attempt at dealing with the infection. Best not tried without prior experience, not, repeat, not for amateurs.