Because Mo Aini lost his vision, his other senses have heightened, just like the Fragrance Master Eucalyptus that he plays as.
Every sound, every sensation..... it became 10 times stronger. Hu Dongtian's breathing and his own, along with his pulse and Mo Aini's own pulse.... It all mixed together in a strange rhythm that he came to like.
"What now, Mr. Hu?" Mo Aini asked after a while of just getting lost in these sensations.
Hu Dongtian was not moving yet and remained sitting stiffly on his lap. Mo Aini wondered what was on his mind now that he can't read it. There's now an element of the unknown that teases him and keeps his excitement up.
"I'm still observing." Hu Dongtian answered.
"Observing?" Mo Aini managed to catch a bit of restlessness in his tone. "Observing my body? Haha, that's really unfair, Mr. Hu. You get to observe my body all you want while I can't even see or touch yours—"