Doc Johnson make the best strap-ons. Their Vac-U-Lock system allows you to use this harness with any of their attachable range of dongs.
The Ultra Harness has an adjustable waist of between 28 to 44 inches; and can be worn by women or chaps. The opening under the plug is high enough to allow the man's penis to hang below.
"Why would a man want to wear this?" Well, this harness is a favourite amongst couples who want to indulge in cuckolding fantasies (without a third participant), big cock play and Mistresses who keep their slaves in chastity. Just imagine your chaste slaves' bits tussled up in a cage whilst you're penetrated by 8 inches of Doc Johnson goodness!