Except on American Airlines . .

. . . a kiss is just a kiss, not a cause for a potentially major incident.

From "As Time Goes By" (word and music by Herman Hupfeld), made famous in Casablanca:

And no matter what the progress
Or what may yet be proved
The simple facts of life are such
They cannot be removed.

You must remember this
A kiss is just a kiss, a sigh is just a sigh.
The fundamental things apply
As time goes by.

And when two lovers woo
They still say, "I love you."
On that you can rely
No matter what the future brings
As time goes by.

Right.

But on American Airlines, no public displays of affection are allowed--by anyone. At least that was the eventual explanation on the flight described in this New Yorker article. I haven't heard about a captain threatneing to divert a flight if an opposite-sex couple snuggled together and gave each other an occasional kiss, but perhaps an example will be forthcoming.

Either way, it will be a long time before I fly American again!