Huh. Let’s take a good look at what Avalongod had to say.
He does not say that “the majority of rapes in prison are committed by homosexuals” – if by that statement you mean that the men who commit prison rapes are men who would identify as homosexual and seek out same-sex relations on the outside – Kinsey-5 or -6 mean. (And note that consensual sex relations have been known to occur in prison, and moderately coercive ones that are not forcible as well – one of the sort where large, strong inmate trades protection of smaller, weaker inmate for sexual release, making the latter into “his bitch”; the quasi-effeminization of the conception is instructive.
Rather, what Avalongod appears to be saying is that men who commit homosexual acts in prison are predominantly amoral insofar as sex is concerned, with no clearly defined moral standard for what they consider “right” or “wrong” in this regard – as goes along with the fact that they were imprisoned for an act society considers “wrong” in the first place.
What their sexual preference in free outside society might be is irrelevant – they’re in an environment where their sole social contacts, excluding rare visits, are with other prisoners of their own sex, plus guards (there being in some states a few female prison guards at men’s prisons, a fact that is essentially irrelevant).
In any population, the Kinsey numbers refer to orientation – what one’s predominant and expressed preference in sex partners might be. Most people do not lie on the extremes of the scale, totally uninterested at any time in their life in sex with anyone of the same sex (Kinsey-0) or of the opposite sex (-6). In Joe Typical, his principal interest is in women, but he had that thought at age 14 about his best buddy Fred. Though he never acted on it, he’s off the “0” point of the scale by a smidge.
Now, in the prison population we have a group of people with a predominantly amoral outlook on life generally and sex in particular – what gratifies or benefits them personally is their focus. Only a small proportion of them are going to be Kinsey-0’s. Their self-identification as “real men who don’t go in for that fairy stuff” may be a preventative to sex, but the human capacity for rationalization will come to their rescue, as it were, and their thinking will be along the lines that “I’m just getting my rocks off; the guy giving me the blowjob is the one who’s really gay.” (And he in turn is thinking, “I’m not really gay, but they’ll kill me if I don’t have Big Jim’s protection, and doing this is a small price to pay for doing my time without getting ganged up on.”)
Bottom line: for the most part the prison population are Kinsey-1’s, effectively uninterested in sex with men if women are available and willing or seducible but quite capable of getting off with another men when they must spend years behind bars with no access to women.
And, of course, probably there are a large number of people whose prison time does not include sex with anybody but Rosey and her five daughters. Prison rapes, and consensual and coercive prison sex, do exist, but we may be blowing the phenomenon out of proportion in discussing it as though it were common. Qadgop and the two or three prison-guard Dopers might have some instructive comments on this.