Oh...that feels nice, actually. His toes point and flex a bit in reflex when Erwin traces over a sensitive spot, but Levi doesn't make any motion to move away, seeming content.

Having pretty much zero sensitivity to things with caffeine in them, it's not something Levi really thinks about for himself. But he'd caught on to when Erwin's cutoff for black tea is years ago, having attempted to chase the man to bed many times only to realize he just couldn't sleep because he'd had tea way too late in the day.

"Yeah, probably." Maybe he is learning, after all? "Okay, we can try that next. Someone probably gave me some in that pile." People had given him so much tea.

He's probably about halfway through it already though.