Interestingly, if you DO google exactly those words, what you get is mostly links to other message boards! The closest to a purely factual and reliable description of this behavior I found was here in an article about dophin encounter expeditions near Hawaii.
Methinks the verb is “mate with” or something more colourful. I’ve heard this same rumour too, is it true? But then, I’ve also heard that Dolphins are the only creatures who engage in sex for pleasure, although I find this very hard to believe, considering I know homosexuality is rampant in the animal kindom, as well as other non-breeding sexual activites.
Well, periodically my wife and I go on a dolphin watching boat tour of Corpus Christi Bay (this tour is run by an old hippie couple who are extremely nice EXCEPT when someone gets them on the subject of aquariums, at which point they go on major angry rants about how Sea World and the like are “abusement parks”).
This couple has come to “know” just about every dolphin in the bay, and they say that adolescent male dolphins are a lot like adolescent male humans. That is, they’re very aggressive, very horny, hang together in gangs, and harrass any female that comes close by.