Ball gag

Francis, in the Broken Hills bar, will challenge the player to a contest of strength if the player's strength is 8 or more. The player's strength and endurance must be 9 each to have a good chance of winning. Losing at arm wrestling to Francis is not good. What happens after losing at arm wrestling, with Francis, is far worse. Players can't be blamed for wanting to see what a ball gag looks like in inventory, but it can't hurt to save first, especially if you want to see what the Power Fist he gives you for winning looks like in your inventory. He has two Buffout in his inventory, either use them on yourself, or for an even better effect, use them on him and wait 6 hours. Only don't save and reload after you've dosed him; the game forgets NPC drug effects after reloading, or even switching zones.

"A questionable sexual device. If you need to ask, you don't want to know."

Well you did spend the night as his gimp... Junk, vends for $20 at the nearby General Store. Although it's possible that this was used for something else, Fallout 2 is notrious for having things cut out(Den residential, EPA) and for being buggy.