Is it possible to be filled to PAST overflowing with cum?

[ErosWired]

The OP’s question is specifically about whether it’s possible to be filled past overflowing. There’s no question that a bottom is going to be unable to prevent leakage while cocks are moving in and out, with flared heads dragging cum back toward the opening with every thrust - but that’s not the question.

It could be argued that the volume analysis should figure around the rectum only, rather than the entire colon, as cum is likely to be retained by the rectal valves below the rectosigmoid junction, and so it would take a significantly smaller number of copulations to do it. But if you think of the filling of an ass with cum in the same way as filling it with any other liquid (say, deep douching), it becomes obvious that an ass could actually hold one hell of a lot of cum before you just couldn’t hold it in anymore.

Either way, I don’t think what leaks out due to fucking counts for this particular query, but I’ll leave it for the OP to clarify.