Hi guys
Not strictly cuckold, but I need your help. The Gf and I have been playing a little game of bets - kinky ones. She's decided on a reward she want's but we're struggling to come up with a bet, I need some ideas please.
If it helps, last bet was that I couldn't reach something high with a humbler on. We've also had bets that my cock was bigger than her dildos (I lost

)
My last suggestion was that she couldn't hold 2 pringles in her mouth through an orgasm without breaking them - she thought it was too difficult and wants something with at least a chance of her winning (actually she'd probably prefer certainty of her winning lol)
Any ideas?
Oh and her reward is that I'll have my cock tied down and be placed in our locking double dildo gag and be her slave for the evening :D, so it can be something easy for her to do/ difficult for me etc..
We're reamisterably reserved..
Thanks in advance!