@TipsyTentacle uhh, double penetration just means penetration by two things, right?

I have 3 penetrable holes so that's a lot of permutations, especially if you consider two things in one hole (which I'm pretty sure has a different name but let's blame jetlag).

@Maenad
I was thinking of two holes being penetrated, yes.
I think having two things in one hole has another term, although I do not think I am familiar with it. (^_^;)