Baph

When I take a pillion, they hold on however they wish.

When I'm the pillion, generally I don't hold on with my hands. Grip the fairing a bit with my legs, and if I think the rider is going to brake hard, I'll reach around & put my hand on the tank to brace myself.

I'm sure others will be along to give advice from the perspective of being a pillion.

Basically, it boils down to a couple of options:
- Grab rail
- Riders waist
- Brace against tank
- Legs gripping fairing
- Probably something I'm forgetting.