My sister, with whom I have nothing in common (I still think that I was adopted and that my real parents are space aliens...), used to tease me when we were children as I was a bit geeky and she was a biker, as in motorcycle. She'd even refer to me as "Bil-BO BAG-gins" with the emphasis shown. Well, when the PJ movies came out, she actually went and saw them and suddenly 'liked' LotR and had about 1000 questions for me regarding the movies - what was in them, what was left out etc.
Not that she's ever been nice, but at least we talked now and again.
And once, my future wife and I (at that time she was officially my girlfriend) were invited to a very strange party. We were to meet others in the woods and were to bring a book or story that we would like to read. Considering the hosts, I thought that the book either was 'cover' for some illicit activity or possibly fuel for the bonfire. But I brought my copy of FotR anyway. My wife, even more incredulous than I, figured that she'd just wing it.
Well, as the 'party' continued we realized that we, like everyone else, were to recite or read a story, preferably something scary. My wife decided that she'd do whatever I'd planned, and so we read the part of the "Bridge of Khazad-Dum" where Gandalf falls.
After we escaped the party, I then explained to my girlfriend why this was such a significant scene and why I liked it so much. Over ten years later, I had to do the same thing after we left the theater showing of FotR.