workinit: I've never really heard of that before.
It could be that you're just noticing something that was always there, and now that you're PEing, you're spending more quality time with your gential region. Or perhaps the jelqing and stretching caused your scrotum skin to bunch up (it is connected to your penis, after all).
I wouldn't worry about it too much, as long as you don't have any problems with 1) Obtaining an erection 2) Your semen load |