He opens a pistachio, discards half the shell in the same bowl, then sucks the nut out of the other half, then discards this half in the same bowl

[Pistachiocray]

This forth date isn't going well.

ah now you see you HAVE to tell us

At least he's not spending the date MNing on his phone OP

ughghghg my son does that - not the sucking part though- I don't really get that, pistachios don't need sucking!

Anyway, because I am procrastinating desperately, here is a pic, for your enjoyment:

LTB

Yes I agree with some of the other peeps. Put out a second bowl or plate and tell him it's a spitoon.