Well, sh!t, everyone experiences attraction to people outside of their marriage. Some are able to maintain their commitment of monogamy and some are not. I don't see how their struggle is different unless they are not attracted to their partner.
What I am comparing is homosexual men (as defined in my earlier post - not attracted to the opposite sex) and infertile people.
If you are not attracted to your partner, I don't see how you can be a good husband. That is what I am saying.