The practice of plural marriage usually differs little from the manner in which it was practiced in the nineteenth century. However, in some fundamentalist sects it is considered acceptable for an older man to marry underage girls as soon as they attain puberty. This practice, which is illegal in most states, apart from polygamy itself, has generated public controversy. Examples include the Tom Green case, and the case in which a man from the Kingston clan married his 15-year-old cousin, who was also his aunt. Other sects, however, do not practice and may in fact vehemently denounce underage or forced marriages and incest (for example, the Apostolic United Brethren.)