is it a crime to steal a kiss?

Yes, especially if you are a 32-year-old Alabama prosecutor in your underwear and the girl is 14 years-old.

Yes, you forced your lips onto someone's face, its assault.

?

Ummm

was it a robbery with a dangerous weapon? if so : yes

Not if you return it

yes

Kissing someone without their consent could amount to an indecent assault.