There's no time for note taking when you're a horny brat with an oversized mouth, right? (Or, titan!Eren on Levi. Soft vore I guess is that what the kids are calling it these days?)
Something tells him that all his comrades are dead, their corpses here or in titans' stomachs. But there's still Levi. (Character death, reincarnation)
In which Eren is a gross little shit and Levi absolutely does not enjoy it at all whatsoever. (Alternatively, Eren eats Levi out and Levi unwittingly enjoys it)