What if you accidentally lick a self-adhesive stamp

This morning Boss ask Ah Boy to post a letter. Ah Boy (the office boy) took the letter lick the stamp, stick it on the letter & left. We all witness it.

Jean go :     ' YIKES....so unhygienic' .
William go:  'leave him be, he's a boy!'
Mrs Lim shouted after him :' Boy don't do that in the future, it'll kill you one day!"
Mimi go   : 'it's dangerous, the side of the stamp could cut your tongue! & where the hell he get this ancient stamp, I thought all stamps are self  adhesive now!'
Jean         : 'that's right, don't tell me , he lick the self-adhesive stamp? YIKES !'
Mimi        : 'if he did that, wouldn't the  self-adhesive stamp stick to his tongue already?
Jean         : 'Good point...YIKES !!!!

At this point, Mimi is already texting Ah Boy to find out if he has indeed lick the self-adhesive stamp ...lol...
We are still waiting for his reply :))

You only lick this kind of old stamps ...lol..