Belle & Sebastian - The Boy With The Arab Strap

An Arab strap is a sexual device usually made of leather and a metal ring that is fastened or cinched around the penis. Its purpose is two-fold: usually to help sustain an erection by keeping the shaft engorged, and for clitoral stimulation during coitus.

Note that placing metal rings around the penis is potentially hazardous, due to the danger of the penis becoming irreversibly engorged, thus cutting off the blood supply to the penis and leading to necrosis of the penis unless the ring is removed prior to irreversible damage occurring.