lovers' link

Almost as bad as getting married!

Slip one of your fingers into the Lovers’ Link and invite the lady to do likewise to see how funny it feels when the fingertips touch. The fun begins when she tries to get back. The harder she pulls, the tighter it grips. By having Two Links, one for each hand, it is practically impossible to get free without assistance. That’s where the fun comes in.

--Johnson-Smith Catalogue, 1929