For some, being a part of a community is an important resource because they often report having felt ostracized. Although online communities exist, affiliation with online communities vary. Some question the concept of online community, while others depend on the online asexual community heavily for support. Elizabeth Abbott posits that there has always been an asexual element in the population, but that asexual people kept a low profile. While the failure to consummate marriage was seen as an insult to the sacrament of marriage in medieval Europe, and has sometimes been used as grounds for divorce or to rule a marriage void, asexuality, unlike homosexuality, has never been illegal, and it has usually gone unnoticed. However, in the 21st century, the anonymity of online communication and general popularity of social networking online has facilitated the formation of a community built around a common asexual identity.