Raziel I hear exercising builds up testosterones and allows one to perform longer when it comes to sexual activity. Another possibility is that the men you met doesn't exercise or have a low sex drive. I don't notice a large difference,
I like looking at guys who exercise more, runners and swimmers, not weight lifting types. But as long as the guy I like can perform reasonably well I don't care, I just want him to be gentle and spend some time making sure I end up satisfied.