gills, small fins, loving HORNS, more genitals for more fun at orgies, and replace everything that's already in the body with things that function twice as good.
yeah.
i've actually put a lot of thought into this.
oh yeah, and special glands throughout the body that generate electricity to shoot out airborne or via direct contact
preferably located at the head, knees, elbows, soles of the feet and palms of the hands.
maybe in the peener/vagoo for loveual stimulus