The threat of such widespread competition can be very stressful to a couple that is not secure in their relationship. There is much more to be learned about the nature of bisexuality and perhaps as bisexual people become more accepted in society, scientific studies will contribute new information to what is currently known. Asexual refers to the absence of sexual activity or a low level of sexual response. However, many organisms reproduce through asexual means, such as budding, spore formation, or fission. Organisms that produce through these means are sexless.
Asexuality can also refer to a lack of interest or involvement in sex in sexual species.
The priesthood in a number of religions, for example, requires abstinence or even monasticism among its members. While individuals who participate in religious abstinence may have normal sexual interest, they are required to take a vow of abstinence. Over time, lack of involvement in sexual activity may lead to a considerable drop in sexual interest. Vows of abstinence may also be taken outside of the arena of organized religion, although these are usually situational and time limited. Specifically, in the case of complete disinterest in sex, the condition may be diagnosed as sexual desire disorder.