Alright, here's my sexy butt, baby. I'll only show you if you keep yourself flaccid, and if you keep stretching your balls.
I want them to swing when you fuck me. Remember how big I wanted you to make My new cock? Well, I want you to make your balls bigger too. I want you to drink lots of fluids, and keep doing your edging drills. I want to see just how big you can get those guys, and how big your cum load can be. Hmmm, we still need to measure that...
Keep massaging your balls, and stretching them out.