Although this is... well... close enough to true, it is not a sufficient explainer as the animals who behave in the manner you describe account for only a very small number of species.<p>Most species have sex extremely conservatively, and very few are capable of the frequency and duration of sex that humans engage in.<p>But why can we observe same-sex pair bonding and sexual contact so frequently, even in species that <i>don&#x27;t</i> seem particularly sexually obsessed?