Granted, but the average young-adult male is short-sighted and doesn't take into account that his partner will attract 10 times as many sexual partners as he will, simply because she has a vagina. You are right: most guys who ask for an open marriage already have a gal lined up, or they are already cheating. That titillation lasts only for a while; up until they see their wife getting dolled up twice a week to go out and get plowed by some stranger. Then it's not fun anymore. The guy realizes he screwed himself into a corner he cannot get out of....unless it was the guys idea and he already had something lined up.