It is one of those curiosities of life that, once you find yourself entwined in a romantic relationship, suddenly, it seems, you've become much more attractive to those around you. All sorts of half-scientific answers have been put forward to explain the apparent phenomenon: might it be pheromones, or a sudden boost of confidence? Maybe the exercise of sex makes you more attractive? Or, maybe, some other person's willingness to shack up with you counts as a vote for your value as a potential partner?

Related Content Why Do Male Birds Take on Larger Predators? Maybe Just to Impress the Ladies

In people, whether hooking up actually makes you hotter is up for debate. But in at least one other part of the animal kingdom having a lot of sex, or, giving the impression that you're having a lot of sex, does actually seem to result in more sex.

According to a new study by Roslyn Dakin and Robert Montgomerie, published in The American Naturalist, male peacocks will sometimes sit around making fake sex sounds, noises loud enough to be heard far and wide—a trick to make other peacocks think they're getting some.

“Whenever a peacock attempts to mate, he gives an exuberant squeal or ‘hoot’ call as he rushes towards the female and attempts to mount her,” says the American Society of Naturalists. Here's what it's supposed to look like (NSFW, due to peacock sex):

Sometimes, though, says the new research, the males will make this characteristic sex sound even when they've got nothing going on. But here's the thing: faking claims of sexual prowess actually make the males seem sexier. Dakin and Montgomerie