He decided to be gluten free 99.9 % of the time.
A lot of people report that they are ok with kissing after their partner brushes...but I wasn't. And we tried the experiment several times just to be sure. It was very obvious.
I let him keep his teeth...but no kissing the days he chooses to eat gluten. He tells me and we just take a day off if he eats gluten. Luckily he doesn't think gluten is worth it very often.