My mom's mother was known for saying some pretty racially discriminating things. She once told my sister that her black baby doll was cute and that she'd "keep the baby, but ditch the husband." She also had a therapist that would visit her home, and before starting a story about him, she'd clarify that he was a French-Canadian-African-American. I wish people would run off a stream of my heritage in an introduction. "Here is Madge, your typical Welsh-English-Euro trash-American. One day she....etc." Of course, many of the things my grandmother said were outspoken and a little shocking. She once demanded that my brother saw her legs off because they hurt. She also showed me her breasts once in a lesson about kleenex and perspiration, but that's a story for another day...probably a day when your stomach is feeling strong and resistant. Good ol' LaRue. We all miss her.
My dad's mother isn't quite as harsh. The only thing I can really think of that might seem taboo is the fact that her heavy-set dog used to have a gorilla stuffed animal he would carry around and in her baby/puppy voice she would say, "Now Shadow, go get your black baby!" Shadow didn't like his white baby half as much. If I wanted to sound racist, I'd say it was because he was all black himself.
I've possibly offended you with this blog, but my point is that you should talk to your grandparents. It's amazing to see how society has changed through the generations. And next time you crack open a Brazilian nut, think of my "grandma wiff da glasses" as I used to say, and thank your stars you never got taught a lesson on tissue and grandmother anatomy like I did.