In many cultures, displaying characteristics not typical of one's gender may be a social problem. In sociology, this labeling is known as gender assumptions and is part of socialization to meet the mores of a society. Non-standard behavior may be considered indicative of homosexuality, despite the fact that gender expression, gender identity and sexual orientation are widely accepted as distinct concepts. When sexuality is defined in terms of object choice (as in early sexology studies), male homosexuality may be interpreted as effeminacy. Social disapproval of excessive masculinity may be expressed as "machismo" or by neologisms such as "testosterone poisoning".