8 XXX : Balls

This is super fucking interesting, original as far as nsfw subs go, but also hot as all hell. Thank you.
Weird, yet very neat!
I wonder if the cremaster muscle (which lifts the testes) is linked to lower intestinal movements that are constantly happening. In a lot of guys the balls pull up when then sense they need to defecate -- so it might be linked to peristalsis down there.
Coolest thing ever!!!
That was actually interesting. Thanks :)
Hot. I'd watch your balls
Fucking amazing! (Nice pair, bro) This deserves to make it to the front page.
Fun to watch
That was some serious science. Thanks for the time-lapse and thanks for the view. Very cool!
Wow, that's awesome. Kinda hot too! ;)
Awesome
Amazing! Wish I could suck it
I love watching mine do this. :D
Okay, this was super cool. Can you feel this? Thanks for sharing.
I’m so fuckin turned on
Hahahha
I saw this happen in one of those grower timelapses and was like "whoa i didnt know balls did that'
Just tried it and it’s so cool!

this clip on clipf.com