Cum Muscles (twitching, spasms, and pulsing)

[lovelycat]

 

[cdunstan1]

 

[lovelycat]

 

[lovelycat]

 

[lovelycat]

 

[lovelycat]

 

[rayt]

6:10

 

[rayt]

4:52

2:35

 

[lovelycat]

 

[Ohheli]

I think it's hot when a bro's gooch or PC muscle twitches while he ejaculates. Nothing turns me on more than watching his bag pulse and/or is hole wink in time to the semen pouring from his penis. It's also hot to see a guy so turned on that his cum tube actually bulges out from the bottom of his penis and has rolling spasms as his cock spits its seed. Does anyone have any gifs or links to anything where we can see a bro's muscles working to pump out his slime? I'll start:
Here's one.
Here's another one.
Number three
Here's a gif.
Another gif
This bro's cum tube came to work.
Perfect example.
Another classic example
I'd love to see whatever you find. I'll also be adding to this thread as I find things.

 

[lovelycat]

 

[lovelycat]

 

[lovelycat]

 

[lovelycat]

 

[rayt]

5:50

 

[hungluver]

 

[Thickstick]

Incredible pulsing around 1:10

 

[Adventor]

Incredible pulsing around 1:10

Good use of his cum too

 

[craigs]

Big dick struggles not to cum - ThisVid.com

 

[hungluver]