Wikipedia
"Treegasm" is the fifth episode of the first season of the American animated television series Ugly Americans. which aired on Comedy Central in the United States on April 14, 2010. In the episode, Mark meets a pair of tree creatures who are expected to participate in a public mating ritual sanctioned by New York City as a festival. Meanwhile, Callie demands to have sex with Mark to ease the pain from her shedding, and Randall loses his penis after visiting a movie theater.
Written by Daniel Powell and Greg White and directed by Aaron Augenblick and Lucy Snyder, "Treegasm" was inspired by funny-looking trees, such as trees that appear to have genitalia or are having sex. The episode also marked a milestone with the staff, as it was the first episode to feature creatures they came up with themselves, as opposed to common creatures such as werewolves or zombies. Stand-up comic and actor Kumail Nanjiani guest stars in the episode as the tree Neel.
According to Nielsen Media Research, the episode was watched by 2.05 million viewers in its original airing, an increase in viewership compared to the previous episode, "Blob Gets Job". "Treegasm" and six other episodes from the season were released on DVD in the United States on October 5, 2010.