The Friendship Ballgag

Ah, two girls, naked and roped, and yet drawn to one another, attempting to kiss despite the fact that both are wearing a ballgag. Image source: Training of O.

Turns out that the girls are drawn to one another because they are both wearing the same ball gag! What a clever way to create closeness! Image source: Training of O.
I've seen one or two other images of two women sharing the same gag in the past, but they are quite rare. Given the general interest guys have in lesbian bondage, you'd think something like this would be commonplace. But it's rare. My suspicious is that the issue that keeps it rare is safety concerns. Chipped teeth might easily happen with the two girls' mouths tied that closely together. Not a lot of wiggle room there. Not that there's anything wrong with bound slaves wiggling!