 Blanchard theorizes that "homosexual transsexuals" (a taxonomic category he uses to refer to trans women who are sexually attracted to men) transition because they are attracted to men, and characterizes them as displaying overt and obvious femininity since childhood; he characterizes "non-homosexual transsexuals" (a taxonomic category he uses to refer to trans women who are sexually attracted to women) as transitioning because they are autogynephilic (sexually aroused by the thought or image of themselves as a woman), and as being either attracted to women, attracted to both women and men, or asexual.Autogynephilia is common among late-onset transgender women.A study on autogynephilic men found that they were more gender dysphoric than non-autogynephilic men.