Overheard in a store:
two young women said hi to each other. One looked at the other's baby in the carriage and said,
"Oy! He is REALLY cute! And he Mamish looks like your older daughter! I really see the chemistry!"
I am not sure if the problem is that:
1. when they first heard the expression they weren't paying attention to the way it was said, and subsequently every time they use it, it is incorrect,.
2. they have no idea what chemistry is or means
3. they are like a lot of people in this neighborhood who don't know how to use the English language properly.
YBS could give them lessons. And he has been in camp, so no good conversations with him. When he is home he sleeps.