Rude is talking with food in your mouth or watching Youtube videos on the bus without headphones. Making decisions about whom and how you allow access to your body isn't on the same plane as rude and polite.
I would question anyone's motives who claims it's "rude" not to let them have some special kind of access to your body.
Never mind fair or rude or what this person or that person wants. It's your body. What do YOU want?
“As I am sure any cat owner will be able to tell you,
someone else putting you in a box is entirely different
from getting into a box yourself.” —bisexualbaker