Qustion from "More of the Straight Dope"

During one of the answers in this book, Cecil complains that all he has received over the years from the ungrateful Teeming Millions is a bootleg Bob Dylan tape, something to do with Dino the dinosaur, “and a pair of long underwear for a guy the size of Santa Claus and hung like a horse (don’t ask)”.

I’m asking. Whayt prompted someone to send the largest possible pair of longjohns to the great Cecil Adams?