Demisexuality is a sexual orientation where you don't feel sexual attraction to any person unless you've had a deep emotional bond with that person. However, sexual attraction can still occur although it's fleeting. A lot of demisexual relationships start out as friendships, and crushes aren't very common. Some demisexuals feel primary attraction, but some don't. Exact meanings and experiences vary from person to person, but a strong defining characteristic of demisexuals is a need for emotional connection.