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.
Being a Fresh Blue Belt - Basically means you are a Target! When you do get the next belt, especially blue belt, it becomes a time when all the white belts focus on you, focus on beating you. Yesterday I went to a different BJJ club and literally there were 30 or 35 white belts and no one else.