Who: Aizen and Ulquiorra
What: ...I'm not sure. o.o
When: Before Aizen posted to Hinamori, and before Ulquiorra went to the human world.
Where: Aizen's quarters, Las Noches, Hueco Mundo
Why: We've never logged them before! :O
Rating: PG
(
I'm pretending not to have the same problem that you have. Sir. :| )