Sexual orientation

Sexual orientation describes a pattern of emotional, romantic, or sexual attraction to men, women, both genders, neither gender, or another gender. The three main categories are hetrosexuality, homosexuality and bisexuality.

Known homosexuals

 * Albus Dumbledore — former Headmaster of Hogwarts School of Witchcraft and Wizardry
 * Gellert Grindelwald — an infamous dark wizard defeated by Dumbledore.

Behind the scenes

 * Besides Dumbledore, there are no other known non-hetrosexuals in the Harry Potter universe.
 * Dumbledore, along with being homosexual, was also revealed to be asexual in his later life, which is the lack of sexual orientation.