No able bodied person, you don’t give up the “Seniors/Persons with disabilities” seat to the lady with a small child and a stroller because you’re getting off at the next stop; you do it because it’s the right thing to do.
An “oh can I take the thank you back” moment when I thought someone moved to the other side of the car so I could sit my fat ass down, but instead they were just moving away from someone with the worst body odor ever and now my nose hairs have burned off.