Over at Dinosaurs and Robots, Todd Lappin writes about finding "a mysterious time capsule sitting curbside on a street in San Francisco: One (1) Milton Bradley Bump Ball, circa 1969, complete in original box."
From a Houston Press page that has information about this nubby toy:
Apparently, the idea was to toss the ball in the air and keep it from hitting the ground by pressing it between you and the nearest hot chick while gyrating to the Bump Ball theme song. A 45 of the song was included with every ball. "It's time the boys got closer to the girls," the album cover continues. The concept had everything. Dancing. Sex. Balls. Rock n' roll. How could the Bump Ball fail?
If anyone knows where a link to this song is, please post it in the comments.