Sr Pasta said:
Well, according to Bruce Bagemihl, a lot of them. AFAIK animal sexuality hasn't been studied enough so far, but his compilation of studies is quite large. I'd guess most species that have the possivbility to masturbate do it.
Ah, Bagemihl. Sadly, his book is not available in any of the local libraries (not too surprising, from the reviews I read). He, too, makes a too simple case of it. Eg. just because 2 male swans together bring up their kids, doesn't mean that they are homosexual. Sorry, again, it's not that easy.
If I'm correctly informed, he quotes some 40 species as having something like what you'd probably call strict homosexuality. 40, hmm... There are 1.5m known animal species, perhaps millions of unknown. 40 of 1.5m is not what I would call the norm. Even if you take the 450 of the website you quoted before, it's still far from that.
Since I haven't found any references, could you provide me with some examples of masturbating animal species & with the number of species that allegedly do it? Same goes for oral sex.
There is in either case no reason to assume strict heterosexuality is the norm for animals. Strict heterosexuality in a species has to be proved (which of course is a difficult thing).
Strict heterosexuality has to be proved? Since it is assumed the norm & there are only few counter examples, I can't see why that should be so. You want to show that it's not the norm, then you have to prove that a majority of animal species differs.
Saying "it's not that easy" is not much of an argument in itself. You need to explain why it isn't.
It's not so easy because you have to look at the circumstances under which allegedly homosexual behaviour occurs.
The only argument you've raised so far is the "waste of energy", but you seem to recognize my counter argument that non-reproductive sex is no more a waste of energy than many other common activities.
For most species it would be a waste of energy because they couldn't earn any advantage through it.
Another argument is that homosexuality needs to spread the related genes. If you don't have offspring there is no such spread. & again this is a point which shows that it's not as easy as you picture it, since different species have different survival strategies & you have to look at the specific circumstances to see if a behaviour is homosexual & if so, how the behaviour survives into the next generation.
BTW, I can't really see the point in this argument, since it's completely unrelated to gay marriage. What's more, as I already said, it's a crappy argument for both sides of the "morality" discussion.