Only in the past few years has the public in general accepted homosexuality and bisexuality as genuine sexual orientations (although debates over cause, morality, and status in society continue), but now another orientation is being proposed: asexuality. What is it, and is it really a sexual orientation, determined before birth like heterosexuality or homosexuality are now theorized to be? Traditionally, "asexual" referred to the reproduction of simplistic organisms (amoebas, primitive worms, fungi, etc.) or in humans to a lack of sexual organs or an inability to feel/act sexually due to disability or other condition. However, the new proposed definition for "asexual" presents it as a (human) sexual orientation, following that if heterosexuality is attraction to the opposite sex, homosexuality is attraction to the same sex, bisexuality is attraction to both, asexuality is attraction to neither sex.