Poor fellas, all they want is to get the key to their chastity, but they have to take the WHOLE knot of that huge dildo to get their respective box to open. The catch? The deeper they go, the stronger the e-stim gets.
Commission for Knedit
Here's an alternate version of a different Sergal friend.

Frumoffu
2019-07-12 22:53:50 +0000 UTC