As a wife, I enjoy fucking other men for many reasons. I like the flirting, the butterflies in my stomach when I meet somebody new, and there is a physical connection. I love being undressed for the first time. I love to put my hand down a guy's pants and find out what he has. Of course, I also want a larger cock, but it is not all about the size of a man's cock that makes me want other men. There are many factors of the game that I enjoy.
My husband does have a smaller-than-average penis, I love him and would not ever leave him, but I am also very fortunate that he lets me play with other men too and that he is also very supportive of my needs in that area.