can kings touch now?
No. Since kings cannot move into a square under attack, this prevents the kings from touching each other, since kings can move once in every direction if not made otherwise.
They can be used in a mating net but not checkmate.
I experienced about kings touching! It's in 4 Player and more variants. I experienced that I won when I ate my opponent's king with my king after probably eating my knight. It's in this kind of variant called "Chaturajj" I'm not lying.