To Brush or Not to Brush

Imagine that it's late at night. You've already slipped out of your normal clothes. You've been kissing your lover and drinking red wine. Then, you suddenly realize you don't have a toothbrush with you. All night long, you've been open mouth kissing this person. Would you then now, share a rinsed toothbrush with this person? Under what circumstances or conditions would you draw the line? Would you admit to it later (like in a blog comment)?