I've seen male dogs hump a couch. The propensity to hump legs is legendary. The question boils down to "what is homosexual?"
I can only speak for homosexual human beings.
(1) Homosexuals can be male or female.
(2) In the West, male homosexuals are often called GAY/s and female homosexuals are typically called LESBIANS.
(3) On a personal note, I tend to think of GAY males and LESBIAN females as being pubescent or post-pubescent in terms of age.
(4) For me, a homosexual male - i.e. "gay" male" - is one who "naturally" experiences feelings of sexual arousal (or, if you like, the typical sensations of amplified libido ( sex-drive), along with a consciousness of sexual desire to initiate (or receive) penile - anal intercourse (i.e. sodomy) or fellatio (either as the "sucker" or "suckee") with another male human being to whom he is personally (erotically/"romantically") attracted.
(4) T think that genuine male homosexuality is a congenital, neurogenetic (medical) disorder, and asa medical disorder, it has a low prevalence in populations like America. IOW, I believe that a male who is genuinely a homosexual is born that way due to some genetic abnormality in the genetic material he inherited from his biological motherand fatherat conceptionis an an inherited, abnormal neurogenetic disorder. When I say a genuine homosexual male, the chief criterion I would use to determine "genuine" is this: if after puberty a male has no interest in what most people would call HOTTIE women; for example, if a teenage boy back in the 1970s, say, had no interest whatsoever in - didn't get turned on in the slightedst - by checking out the Chix in the latest "Play Boy Magagine"; or went to a strip club with some male buddies when he was in his early 20s, but didn't get the slightest bit sexually aroused when watching any of the "sex-bomb" girls do her acts (I mean, doesn't get "horney" or get a "boner" or think to himself "Gawd, wouldn't I love to fuck her brains out right now ! etc;- you know what I mean). THIS IS, I THINK A VERY, VERY RELIABLE TEST FOR GENUINE MALE HOMOSEXUALITY IN A PUBESCENT/POST-PUBESCENT MALE.
PS: I don't think the vast majority of FEMALE homosexuality has a (biological) neurogenetic aetiology. I do think women are naturally more ANDROGENOUS than MALES, what I mean by this is straight girls/women are more open to periodically (or experimenting with homosexual behavious (for example kissing each other or fondling each other's breasts) "for fun"
Notes:
NB:The above is a attempt at a fundamental definition of "What is a male homosexual," but it is far from comprensive. There are other things that could be mention as well, such as...
(1) A signicant portion of homosexual adults are predisposed to sodomising minors. (Males under the age of 18). This is a finding that was documented in relevant, mainstream, scientific research literature in the US many decades ago, but you will not find any mention of it anywhere on the internet today as the entire issue is now, of course, politically taboo - "unspeakable."
(2) In some male homosexual relationships, one parter habitually assumes the (DOMINANT) role of SODOMISER ( i.e. the partner who inserts his erect penis into the bung-hole of his passive lover). The sodomiser often referred to in the slag vernacular as: the "TRAIN", while the passive partner who is typically anally penetrated is known as the "TUNNEL". Reddit? Picture in your mind's eye a "Choo-Choo" train entering and disappearing into a tunnel).
(3) In a homosexual partnership , or homosexual intercourse in general, the sexual role played by a gay male can also change; for instance, the two members of a gay marriage may take turns at playing the "TRAIN" or the "TUNNEL."However, I have been told (though I don't know, for certain ifif this is correct) that in a stable, homosexual partnership between two gay men (e.g.like an enduring gay marriage), one partner tends to take the dominant role sexually (i.e. is the "TRAIN") while the other partner accepts the PASSIVE SUBMISSIVE role of (the "TUNNEL")
(4) Like heterosexual adults, homosexual men no doubt engage in 'threesome" and "foursome" sex as well as (larger) group sex and full blown orgies involving literally dozens of gay men engaged in sexual behaiours (like sodomy, fellatio, giving "hand-jobs" and so on).
FEMALE HOMOSEXUALITY...
Female homosexuals are tpypically post-pubescent females, they are known as lesbians, or, in the English, slang vernacular as, for example : "trout sniffers" lickalotopi; donut bumpers , "crack snackers etc. The causes lesbianism are, I think, more psycho -social than they are bioloogical. In fact I do not believe that female homosexuality has a biological aetiology - that is, I do not think is is caused by any inherited neurogenetic abnormality/defect. I think the causal factors associated with lesbianism are complex and numerous. I do have some of the nailed down, I think, so if you're interested I'd be happy to tell you what I think; (though it would require a separate post).
Dachshund - the WONDER HOUND
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