Ooooolllld joke, but she had never heard it. I was minded of it because, when I go for a teeth cleaning, I like to use some lip 'medication' prior to the procedure. Lipsyl, or Blistex or whatever, so that when they stretch your lips to do the work, the lips actually stretch. And, the salt solution they use for cleansing irritates the lips if you don't have some lip balm on.

OK then, the joke... shortened... (when feathered out and told right, it's pretty good... but still old...

Cowboy arrives at saloon... ties up horse... waters... feeds... grooms... lifts tail and kisses ass... walks into saloon and orders whiskey... barkeep pours and says, "nice horse"... "Yup, been though a lotta miles with that horse"... "Ya take good care a that horse. Ya watered, fed and groomed him before ya even came in fer drink. But, I noticed ya kissed it's ass?... "Yup, that's fer chapped lips"... "That cures chapped lips?... "No, But it'll keep ya from lickin em."