Evolution of monogamy Monogamy occurs when one male mates with one female exclusively. A monogamous mating system is one in which individuals form long-lasting pairs and cooperate in raising offspring. These pairs may last for a lifetime, such as in pigeons ,  or it may occasionally change from one mating season to another, such as in emperor penguins. Zoologists and biologists now have evidence that monogamous pairs of animals are not always sexually exclusive.
And, believe me, there are more than you would think. Masturbating actually comes with some pretty sweet health benefits, as well as some other awesome benefits. Read on to check out these 10 crazy and interesting facts about masturbation: Bringing yourself to orgasm can help relieve menstrual cramps and backaches from having your period. So the next time you're feeling the effects of PMS, try doing it solo for a little bit. ShutterStock Kids Can - And Do - Masturbate Masturbation isn't just for horny teens and adults - kids can also indulge in a little self-pleasure which honestly sounds so weird I can't even believe I just wrote it.
The word masturbation itself is sure to get a giggle in any crowd. Surgeon General Jocelyn Elders was even fired in for suggesting at a U. Conference on AIDS that young people explore their bodies aka masturbate! Yup, she was fired for suggesting that teens should masturbate.
Amazon Basin Hybridization In , three strange dolphins beached off the Irish coast; they appeared to be hybrids between Risso's and bottlenose dolphins. In captivity, a bottlenose and a rough-toothed dolphin produced hybrid offspring. The wolphin is a fertile hybrid.