Behind the act of giving up one's seat

 He was sitting by the window on the bus, admiring the scenery outside, lost in thought.

Suddenly, a pregnant woman moved next to him, and someone tapped him on the shoulder:

"Young man, why don't you give up your seat to the pregnant lady next to you?"

Immediately, everyone on the bus turned to look at him, and his face flushed red.

He paused, then a relaxed expression appeared on his face, and he stood up and politely offered his seat.

Back home, his legs were a little sore from standing the whole way. He sat down, slowly removing his prosthetic leg, feeling happy inside.

He was finally being treated like a normal person.