Nahhhh that's santorum, heavy on the lube. The colon (and rectum and anus for that matter) is not a vagina. Im not aware of it producing all manner of secretions during sex, like female organs could.
"But but but, doesn't the colon have mucus cells?" I hear you ask. Yes, there are mucus-secreting cells there, but when you look at the histology of the colon, the tissue is mostly cells that absorb stuff (water mostly, a lot of what the colon does!). The mucus is there mostly as protection.
So, naaah. Naaaaahhh. Any wetness down there is gonna be santorum or the dudes nut. Dudes need to stop calling their booties *ussy or bussy or mussy and whatever the hell else they do these days. The booty just doesnt work that way. And youre not a woman.
Now imma go back to..um...investigating those vids.