"Smack" can mean "kiss" as in air kisses, as in lip-smacking, but that can lead to "smack" as in "hit" as in domestic abuse, because sexual attraction can seem threatening.
"Smäcka" kan betyda "kyssa",  som i luftkyssar, som i läppkyssar, men det kan leda till "smäcka" som i "slå" som våld i hemmet, för att sexuell attraktion  kan verka hotfullt.