I don't see any condition regarding only one penis per hole. I do see the statement 'adding another object will force you to reuse one of the holes' which to me supports the argument that if capable, a woman can enjoy the pleasures of additional men beyond three.

Thank goodness!

__________________
Put me on wheels and I'll turn tricks.

Clever? Nah, I ran out of that years ago. But if you find this, let me know, k?
"The road goes ever on..." ~ Tolkien

In memory of my friend skip...
Go then, there are other worlds than these