Wherein Dear Abby does a huge disservice to all her readers

A reader writes in to Dear Abby complaining that her fiancé is hiding gay porn around the house and hitting on her male friend. Dear Abby replies:

It is highly unusual for straight men to keep pictures of naked men under their mattress. You have given me three reasons why you suspect he's gay, which indicates that your alarm bells are sounding. By all means address the subject with your boyfriend.

Although your boyfriend may not be gay, he may be bisexual -- and that spells trouble ahead if you marry him. If I were you, I'd put the marriage on hold and listen to my intuition.

Yeah, good job Dear Abby, go around precipitating the misconception that bisexual equals incapable of monogamy. That is going to do SO much good for all humanity!

While I can see that it could be a problem if the fiancé is not capable of being sexually attracted to the woman who wrote in, because most people do want mutually satisfying sex to be part of their marriage. However, if he is capable of being sexually attracted to her, regardless of whom else he may be capable of finding attractive, the crux of the problem seems to be that he's hiding porn in the marital bed and hitting on her friend, no?