Nullo (body modification)
The term nullo (or smoothie) refers to an extreme body modification subculture made up of men who have had their genitals (and sometimes also their nipples) surgically removed. Nullos are not necessarily transgender; most identify as male eunuchs. They are usually either asexuals or submissive homosexuals. The term nullo is short for genital nullification.
One of the most famous nullos is Mao Sugiyama, a Japanese artist and asexual activist who in 2012 had his genitals surgically removed, cooked, and served to paying guests at a public banquet. Cannibalism is not a crime under Japanese law. Sugiyama, who uses the nickname "Ham Cybele", also had his nipples removed as well.