Threesome hookup can change the dynamic between a
couple. For example, a pretty woman is in a relationship with a plain guy, or
she thinks he is plain. They had a threesome. After watching her boyfriend with
another woman and seeing that this woman is kissing her boyfriend, she thinks
her boyfriend is quite a catchy. This is a feeling aroused by jealousy. It can
change your dynamic, believe it or not. It can. The same as for wife sharing.