How do you deal with a partner who is into light bondage?

Answer 1

Buy a whip.

But seriously, is the reason that you are asking this question is because you are not into light bondage? You should tell your partner that, especially if you are the one being restrained.

On the other hand, if they want you to tie them up then you don't have to tell them that you're uncomfortable with it outright: because it's only light bondage you could just alter the situation into something that sits better with you, for instance by restraining them in a way that causes you less anxiety.

What is done to the restrained person can be changed until it's mutually satisfying - what about tickling?

Above all else remember to have a safeword!

P.S. If you don't trust your partner enough to ever put you into light bondage then maybe this is a symptom of a deeper issue in your relationship.