Bronx Zoo Visitors Watch in Horror as Gorillas Engage in Oral Sex

Visitors to New York's Bronx Zoo saw more nature than they likely expected when a male gorilla decided to perform oral sex on its partner -- in full view of dozens of people. The steamy encounter occurred this week inside the primate enclosure, according to an unidentified witness who caught it on video. “I was in the gorilla exhibit with my 4-year-old daughter and niece,” says the man, who wishes to remain anonymous. “My wife had to stay out of the exhibit with my sleeping son, so I wanted to capture a lot of video. Then this magic happened. I was shocked and had no idea that was a ‘natural’ act." Animal experts say while the deed may have been dirty, it was far from uncommon. A number of wild animals -- including cheetahs, bears and bats -- have been spotted performing fellatio, they say.