best way for a passenger to ride a sportbike?

[shmike]

If she has her hands on the tank the whole time, that will put constant pressure on her wrists.

T will move her hands freely if we are just cruising. She knows to place them on the tank if I start to brake.

For the majority of riding, she doesn't really have to "hold on". Acceleration is truly the only time it is necessary.

I like my passenger to have at least one hand on me so I know they are alert and ready to grab ahold if necessary.