This entire article is hilarious

[Occhidiangela]

I view beastiality as a sexual kink.

That is one way to look at it. I'd rather not watch, personally, but then, I have been to a real live dog and pony show, and it ain't pretty.

As such, it's not something that eveybody and their mother needs to know about.
Some people might view "the discovery of homosexuality" along the same lines as a kink. As long as we ignore exclusive homosexuality (instead, the partner might be bisexual), the relationship still has the potential to continue. Unfortunately, I can still see many people in this situation viewing it as a relationship-ender due (1) to assuming their partner is exclusively homosexual or (2) to not wanting to be associated with a "queer." (1) is just wrong, and the assumption comes from not realizing there's more than just "straight" and "gay."

Lem, you might want to add to your list the problem of how people handle affairs outside the context of the relationship. Some people are more possessive than other, or are dead set on the monagomous relationship being the only suitable model. Relationships of any sort can founder on such grounds.

A "discovery" that one's partner swings both ways could be anecdotal, as in

"yes, two years ago I had same sex sex and rather enjoyed it" that may be more easilly resolved than

"you just had sex with who?"

The problem to deal with on the second reaction is the problem of breaking the trust in the relationship.

Or is that what you were getting at with this?

Unless the bisexual partner was committing adultery (or something else that's actually objectionable), the situation need not be seen in that light, but I think for some people it'd just work that way.  Nevertheless, I think it's still a valid potential relationship-ender. If your partner gettin' it on with a sheep grosses you out to the point where you can't perform with them, that's just how it is.

Adultery is normally confinded to a discussion involving marriage, though one doctrinal definition is any sex outside of marriage, which would put all homosexual sex into adultery (or more properly fornication) unless the couple are operating under conventions where same sex marriages fit within norms/doctrinal limits.

On the other hand, if the lady loves the family horse, there are likely to be some endowment insecurities leaping to the fore in any discussion over resolving that excursion outside the box . . . so to speak.

Occhi