Here's the video which caused me to become bi curious. The twitching at 2:35 of the video just it a spot in me.
big cock anal creampie bareback - Pornhub.com
Cum muscles (twitching, spasms, and pulsing)
big cock anal creampie bareback - Pornhub.com
Cum muscles (twitching, spasms, and pulsing)