Most things I have loaned dont come back.....but they are things I dont care that much about and am willing to replace. I assume before loaning something that it will never come back. If I am ok with that, then I loan. If not, then I tell the borrower they may bring their stuff over and use it at my house, but I am using said item currently and dont have time to loan it out.
I was also raised that you return anything you borrow in same or better condition than you borrowed it.