I've had mild to pretty severe bruxism (grinding of teeth or jaw clenching) for a good portion of the last ten years. So I suppose that would explain why I've never had a problem with "marathonlingus".
If you're smooth, wet, and delicious I'd have no problem with extended sessions. I should use this to my advantage when I go for my first reviews
I've always preferred to start very tenderly, let her sink into it like a hot bath. Then gradually increase in intensity until I'm pleased she is pleased. Rhythm is key, for both participants, being in sync is incredible.
I'd be curious to find a woman who will explosively squirt all over my face while I do so. I'll put it on the bucketlist.