These effects rarely last more than a few weeks or months.

Since the lust and attraction stages are both considered temporary, a third stage is needed to account for long-term relationships.

Attachment is the bonding that promotes relationships lasting for many years and even decades.

If sexual passion is also involved, then this feeling is called paraphilia.

A common principle that people say they love is life itself.

Modern authors have distinguished further varieties of love: infatuated love, self-love, and courtly love.

Non-Western traditions have also distinguished variants or symbioses of these states.

vulnerability and care theory of love), including oneself (cf. In addition to cross-cultural differences in understanding love, ideas about love have also changed greatly over time.

Some historians date modern conceptions of romantic love to courtly Europe during or after the Middle Ages, although the prior existence of romantic attachments is attested by ancient love poetry.

Throughout history, philosophy and religion have done the most speculation on the phenomenon of love.