This type of behavior stems from two areas, ownership and sexual performance.
Ownership is pretty simple. Most guys and girls in a relationship will claim ownership of their partner. With sex, guys will want to be your(girl) one and only. The guy feels as though the sex that you have together is so much better then
ANY OTHER guy can give you. This is definitely possible with the aspect of connection in relationships.
Guys take
A LOT of pride in being able to please a woman sexually. Its just one of those things that we have learned socially in some aspect. Most of us have developed an ego around our sexual performance and that we're the best at it. With relationships, the sex can become monotonous and predictable. Since guys have built such an ego around this, they will rationalize it in a different way, usually blaming something about the girl. This is something I hear from guys in marriages.
This is a very sensitive area for
MOST guys. The same with their 'skills' to pick up women. I have felt these types of feelings pretty extensively and am consciously becoming... more conscious
