Which one has a bigger penis? You decide. A man is filming a documentary and realizes there's a kangaroo masturbating behind him. No. Seriously. I didn't know animals masturbated either. An elephant swingin' his big ole elephant dick. Here's a walrus enjoying a good wank. 1. Approx. 1500 species of animals display homosexual behavior. 2. Many animals engage in bisexuality, especially in chimp communities. 3. Animals do NOT just use sex for reproduction. It's common to find hetero and homo fellatio behavior in animals like goats, chimps, kangaroos, etc... 4. Gay dolphins have nose sex, one male dolphin will sexualize the blowhole of another. 5. Some animals engage in necrophilia and rape. An observer saw two male ducks fly into his window one time. Apparently the ducks were engaged in "flight sex." Imagine doing it while you're flying. Anywho, the bottom duck died on impact but the top continued fuckin' him. Interesting. 6. Worms are asexual and reproduce through penis wars. They jab each other with their penises until one "ejaculates" on the skin and the reproductive fluid is absorbed that way. Guys, imagine having a sex fight with your boyfriend and the loser has to carry a baby for 9 months. 7. Wild mooses sometimes try to fuck domestic horses. 8. Geese and ducks combine sex with violent assault. That rough shit.