A fairly classic use for elfs is, of course, as all-purpose garments/fashion accessories/living ballsack supports. They keep your dick warm AND make a statement about your social status!
Every gentleogre worth his snot-green salt stays strapped with at least an elf or two at all times, but the real cream of the crop carries enough to lend out to friends in need, too.

( 3 whole ElfHole™ in a month, wow! This series will go on the backburner for a bit, I think )