Difficulty in making wild animals mate heterosexually is a big problem in zoos. And it is any wonder? The scientists go on the premise that animals are 'heterosexual' like the humans --- and as per the theory of Darwin. So they bring in a male, and bring in a female from the wild and put them togther. And then.......well nothing happens. So then they try to make up several far fetched excuses and reasons for the same. E.g. the temperature is not proper, the animals are not comfortable and what not! They don't realise that males will only approach females when it is time for them. And the time rarely happens. It certainly doesn't happen whenever humans want to happen --- even if the female isi ready. They showed a programme recently about a pair of apes in a zoo in Mexico. The male and female have both been brought from different zoos. Everyone is keeping their fingers crossed hoping for them to mate. They described the male as liking the female.....and hopefully one day will want to have sex with her. The male however is so far not interested. In a programme on leopards on T.v. they showed how a full grown adult dominant male repulsed the calls of a female in heat because he just didn't want it at that point in time. (some years later he did mate with a female.....but for a very short time......and as soon as a potential prey came, he showed the female the door.....and wouldn't share his food with the female......just growled her off. There is an ancient tradition of articial insemination employed by the farming communities in some parts of eastern europe for cows. To artificially inseminate cows they need the semen of the bull. So why don't they just put the bulls and cows together. Because, that rarely works enough. So how do they collect the semen of the bulls? Do they force the bull and cow in a sexual position to arouse the bull? No that doesn't happen easily too. But there is one sure shot way that has not failed to work for hundreds of years. They just put all the male bulls in a circle with their mouth touching the other bulls behind. This forced sexual position instantly gets the bulls into a sexually aroused position, which never fails. Then the farmers just milk the bulls into an artificial vagina. In the thread on "there is no evidence for heterosexuality in nature" Metakron described how his I think biologist friend made up artificial female pheromones and was so confident that the male will respond to it and will achieve sexual arousal so that they could collect his semen. It just did not work on the horse. Surprisingly, many domesticated animals are made more or less heterosexual......though you may still not be able to force them to mate as and when you want......you can just make them comfortable to be around with the females or to teach them to bond with them, by 'training' them and keeping them away from males. You have to remember the case of how they make domesticated horses 'heterosexual'.