It is a category belonging, not without discussion, to the sexual orientation. An asexual person is one who does not feel sexual attraction for anyone and who has no or little interest in sexual activities. This does not include affective relationships, since an asexual person can, for example, fall in love. The lack of sexual attraction does not prevent them, however, from having sex with their partners, to please them or to have children. Asexuality is also sometimes referred to by the English expression “ace”. The opposite concept of asexual would be allosexual.