FCS-Ian just came over to pick up our air mattress (well, technically it belongs to my housemate) for his wife for a conference. It occurred to me after he'd left that hey, giving gifts on one's birthday is a Hobbit tradition. (I have retained this information primarily because of musesfool's tradition of writing fic on her birthday.) We'll get the air mattress back, but I think she is definitely experiencing this loan as a gift, so my analogy still stands.
P.S. I am amused that on my facebook profile, the line where it has your birthdate, right now it says, "Today is your birthday"