perm three

male homosexual partners have the chance of a permutation of three. viz.
1. partner A. foreskin partner B. no foreskin
2. partner A. foreskin partner B. foreskin
3. partner A no foreskin partner B. no foreskin

steven minced in "hi duckies, alec's got a new partner""perm three?" questioned kevin "not likely" retorted steven "he's gone and got himself a bloody gnome"