Sex Scene Vocabulary

Slash fans, what is your preferred term for that part of the anatomy frequently featured in m/m sex scenes that is not the throbbing jade tower of desire?

- opening
- ass
- anus
- crinkled pink pucker of earthy delight
- ...?

Personally, I tend to feel that anus is too medical, ass only fits very specific character voices and contexts, and anything longer than one word is overthinking it. But that's just me! What about you?

Tell me! Inquiring minds, and all that. ;-)