Tribulus terrestris is the #1 selling testosterone booster, and the best example of a supplement that increases libido, but has no effect on testosterone.
Ab belts may cause muscle contractions if used properly. But the belt alone cannot produce six-pack abs. The real challenge to ab definition is the layer of fat that lies right under the skin, hiding muscle tone.
The wearer of the belt is regarded as the submissive in a BDSM relationship. This is a part of the wider practice of orgasm denial. Some claim it increases submissiveness in men. It has often been reported that when worn, the chastity belt frequently evokes sexual frustration in the wearer.