He stuck his finger into a jar of biscoff spread, took a load out, licked his finger, then did it again.
Second time was for my benefit because I said "don't do that! You haven't washed your hands!" Because he thinks he's funny.
That's fucking disgusting isn't it? And childish? I'm not being unreasonable to be grossed out and refuse to have anything more to do with said jar of biscoff?