[egghead]

bro asig, agree with you to an extend on frenching experience. That's why OKTs often advise FLs not to reject frenching service outright but subject it to chemistry. It often ends up not getting that service and avoiding customers passing by the FL because there is no prospect of frenching. That's my take.
On the flip side, think about frenching a mouth full of cigarette smell? It may not be as pleasant unless one doesn't mind the sour after taste.