What are some “odd” things older generations have shared with you that they did?

My baby still has a couple of more months to go before solids begin yet my MIL has been asking me for weeks if baby will begin eating soon. She seems eager to feed my baby and I have a feeling it’s going to be junk food as she sees no issue in giving babies sugar, pop, etc so that’s an issue we will deal with later.

But! She told me when babies were about 3 months plus they used to put oatmeal in their milk bottle and snip the nipple so they could drink their oatmeal. I didn’t know what to say as that just feels so early for oatmeal for a baby. This got me wondering what other “odd” things were considered okay back then and now are a bit of a shocker