I had motorbikes too and never thought of that ! Climb on right foot down kick stand up left foot on and off ! It all makes sense !Always get on from the left. Nothing to do with being right-handed, it's a legacy from lots of years motorcycling.
The side stand on motorbikes is on the left, so the machine is leant over to the left on the stand before you mount and pick it up to vertical.
It's awkward to mount a motorbike on the sidestand from the right, and old habits die hard.
High Rider/Penny Farthing/Ordinary!!Sounds very painful, indeed.
Some people built their careers on the risky move.Sounds very painful, indeed.