With regard to sexual orientation categories, asexuality may be argued as not being a meaningful category to add to the continuum, and instead argued as the lack of a sexual orientation or sexuality. Other arguments propose that asexuality is the denial of one's natural sexuality, and that it is a disorder caused by shame of sexuality, anxiety or sexual abuse, sometimes basing this belief on asexuals who masturbate or occasionally engage in sexual activity simply to please a romantic partner. Within the context of sexual orientation identity politics, asexuality may pragmatically fulfill the political function of a sexual orientation identity category.