There is a running-gag in the gay community "a guy with an unwashed ass" which is used for straight guys.
Also, many women told me that they were in love with guys with bad hygiene, some of them never washing between their cheeks because "nothing goes between my ass cheeks, that's gay shit!"
Some women even going so far as saying "if sexuality was a choice, why in their right mind would anyone choose (unwashed) men?!"
So maybe this isn't that big of a problem in terms of sex and intimacy as you and I would think?