The zoo's penguinkeeper, Jane Tollini, developed the idea when she discovered that penguin breeding habits corresponded with Valentine's Day. Tollini invited some friends to watch the penguins, cut out paper hearts, and played some Johnny Mathis. Amorous Animal Antics Tourtakers shouldn't expect to see any wild animal antics in person. In the past, the closest thing tourists saw to a peep show was a rhino courtship display and two newborn baby goats, says Chan. The tour also showcases sexual adaptations unique to each type of animal.
Orangutans do it upside down.
In addition to courtship rituals and the faithfulness of animal couples, the tour covers the size and shape of animals' sex organs. Gorillas, Chan explains, are not as well endowed as they put on. I think people are really interested in that for some reason. The San Francisco Zoo Valentine's Day Sex Tour is limited to guests 18 and older, who will travel around the zoo in rented cable cars. Ours is the original.