BJ help? Jaw pain

Ok so I’ll try to keep this brief haha

I have jaw issues (I clench my jaw, especially at night) and I find giving my hubby a BJ hard to do. My jaw gets sore really quickly and it’s so uncomfortable. I know he loves getting them and I feel bad I don’t do it often enough/ long enough.

Any tips or ideas to help?

I do have a jaw/ mouth guard to sleep in but it’s honestly more to protect my teeth and not so much to help with jaw pain..

I’d like to be able to do it for my hubby more!