Probably, its delegation of responsibility for the failures. When no matter the efforts you'll get cucked, it is a really good mental copium that this outcome was inevitable, and there is no fault on you or your actions, especially when there is a superior bull that always successful and wins. Idk, basicly you horny because every need of sexual matter of your partner(love interest) is solved completely and unreservedly by other, and you yourself do not believe that you would be able to do this better, or even worse, you are so afraid to fail, that by default you wish for some superior male figure to take control over the sex pleasure task. I think ntr and being horny from ntr is all about insecurities and lack of self esteem as male.