There's a shrug, not dismissive but unconcerned, as though the idea of "doesn't mean you should" doesn't apply to him. Life is, especially his own, about enduring pain and confusion that come with being alive, so to endure a little more for someone he cares for is easy to do without second thought.

Even if hay fever is awful. He sniffles and takes the mug. The ginger spice manages to penetrate his clogged sinuses in a pleasant way (even if he has to grab tissues as it makes his nose start to run). He curls up around the mug like it's a little flame, holding it to his chest. Then he glances up at Midoriya, curious (or maybe he's just trying to hold back a sneeze).

"Why? Did you cover it in slime again?"