Bare breasts are shown in the opening sequence (animated, about 3 seconds) on a building
A bird flashes his butt to a female bird (partially censored), played for laughs.
Features female nudity, simulated sex, phallic symbols, and other sexual situations. - common sense media
Sexual conversations + innuendos
A toucan pulls a sex toy from her box
A plant lady (human body, leaves for head) removes her shirt and is topless. Bare breasts and nipples are seen
An episode revolves around a main characters sex life and her trying to "spice it up". A characters bare breasts are seen and two characters having sex in a porno are seen.
The second season is significantly cleaner than the first since the show changed networks. There are no more bare breasts.
An episode contains a brief scene in which males masturbate in a circle. No nudity is shown.
In one episode, a character uses a vibrator and two characters visit a sex shop.
Season 1 contains many different instances of nudity throughout. Seasons 2 and 3, on the other hand, has no nudity.