Any two people of the same sex that are friends are technically in a homosexual relationship given that friendship is a type of relationship and homosexual means of the same gender. What makes a homosexual relationship "gay" is that the homosexuals involved are fucking each other.

All of the examples I mentioned do have same-sex intercourse. Some of them also stay together and (if they can get some) raise children together.

It always bothers me when things are worded like "misfired sex" because is portrays any sexual orientation differing from the standard as a defect.

I explained what I meant by "misfired" sex. It isn't homosexual sex, which is perfectly natural. It is when an organism is incapable of accurately determining the sex of a prospective partner, but fucks it anyway. As in, the organism intends to have heterosexual intercourse but its recognition "misfires" (very commonly observed in species with little sexual differentiation, or in environments where those differentiating details aren't evident).

That said, I don't see anything wrong with acting on impulses unless they are the kind of impulses that lead you one to actually inflict harm on others. Do what thou wilt and all that jazz.

Absolutely. In my view you should be allowed to do anything which doesn't impinge on the rights of others.