I have been on a bike as a pillion. I have kids so there's not much point in owning a bike ATM, can't afford to run one anyway! I probably would if I could. There are adaptations available, handlebar gear change, that sort of thing.
I wear whatever I like, don't feel a need to cover it up.
My eldest (23), was freaked out by it but the others were all fine. DS, 5 at the time, was excited about me getting a mental egg...(metal leg!)
Now exh was supportive in theory but practically useless.