The 1967 album by John Lennon and Yoko Ono. They recorded it on their first date as they experimented with various drugs. When they finished recording, they stripped down and took some pictures of themselves.
Yeah, this is that album with the naked John and
Yeti Yoko on it.
For this reason, many people thought it pornographic, and were outraged. Uh, too bad. It was still sold, but always discreetly. Many record stores kept it behind their counters, or wrapped in a brown bag which showed only John and Yoko's head. However controversial and shocking, this was the worst selling of all of John and Yoko's records.