"My parents did it with me and I turned out fine"
or any other stupid variation, I'm going to throat punch them. DH especially. Just because folks did/didn't do things in the 60's, 70's, whenever, doesn't necessarily mean it's ok now. People thought it was ok to smoke while pregnant back then too, remember? We have more research & knowledge and the access to it.
This comes after a conversation with DH about how I don't want people giving DD sips of beer while not only does he not have a problem with it, he intends on doing it himself. When he was a toddler, he snuck sips from his dad's beer at a party and ended up drunk because he had about a half a can. His family thinks it's the funniest story.DH doesn't see any problem. I can definitely see an argument about this coming.