,Never heard the thing about semen, could it be u are a sensitive guy and not really getting what you need out of sex? For a long time there has been a stereotype that men just need to pardon the vulgarity but "get their rocks off". This is total bunk men need the intimacy,bonding and closeness that can accompany these acts just as much as women,but I would imagine if a guy has heard the other a lot and "bought" into it that it could be quite a let down emotiionally, just a thought