Cuckolding and hotwifing, both very popular fantasies at the moment. Depending on the couples’ dynamic, they are either one or the other.
Cuckolding involves subjecting the male partner to some form of humiliation,by asserting that the ‘bull’ is a better lover.
Hotwifing involves the female of the couple enjoying the company of a ‘bull’ and recounting the encounter to her male partner who fully enjoys her independent sexual explorations and adventures independently of him.