With all the other traits I'm looking for? Sure, it certainly is not a negative.
For what it's worth, I know tons of guys, who are fat, ugly, etc. who fool around on their wives, and with women not as pretty, so if you are hoping unattractive gets you fidelity, you are out of luck.
Yep, women hit on my husband, men hit on me. Guess what? We are happy for the spouse when it happens, it makes you feel good.