When I was getting ready to go to Brigham Young University, a year early, my parents assured me that everyone was popular in college, so I signed up for the honors dorm. Which was full of nerds. My roommate was supernice, but he was getting up at 6AM before orientation even started, because he knew that's what he was going to have to do when he became a missionary, so.
Also, he'd walk around with a Walkman on, singing some headbanger song, but when it'd come to the line, "making love to every woman I meet," he'd change it to "making CAKE for every woman I meet." I can't figure out what that song was, either; it's like it's playing, muffled, a room away in my head. I lasted about three days and then moved to the normal dorm with a bunch of guys from Southern California, and it all worked out. Anyway.
Point is, I used to sing the Red Hot Chili Peppers' "Under The Bridge" to the kid to get her back to sleep. Until she started understanding the words, which seemed pretty heavy for a toddler.
And I sang Johnny Cash's cover of Trent Reznor's "Hurt" to K2 until I hit the same comprehension threshold. Now I just sing it as a joke, but with changes like, "I burped myself today. To see if I still smell" in my best, late Cash growl. They're rarely as amused as I am.
Which makes me wonder if anyone else does this, besides me--and, of course, Adam Buxton.