The video Fly by Yoko Ono and John Lennon is from the period in which Ono took a fly as her alter ego.

Her voice—in the voice of a fly—is the soundtrack for 25 minutes of video in which a fly (many flies that seem like only one, actually) explores a naked woman's body. (Or does the fly equivalent of exploring, which may not be exploring at all but just, you know, existing in and around a thing.)

According to one source,

Fly ... took two days to film in a New York attic. ... John and Yoko asked New York actress Virginia Lust to lie down naked whilst they filmed a fly exploring her body. Approximately 200 flies were used and each had to be stunned with a special gas. The film showed a fly traversing the girl's body from her toes to her head, exploring every part. It was claimed that Virginia Lust also had to be sedated during the filming.

I just thought you might like to know about it.