Ladybirds are remarkably promiscuous. As many as a thousand individual ladybirds have been observed aggregating, apparently for the purpose of having sex – and it seems just for the hell of it. During these aggregations the beetles copulate often, but no ovipositing (egg-laying) females or larval ladybird beetles can be observed. Incidentally, ladybirds have the highest prevalence of sexually transmitted diseases of virtually any insect. And London ladybirds are top of the STD league, with more than 90% being affected.