In one study of detransitioners, males were three times more likely than females to have transitioned for erotic reasons.
In a study  of 100 detransitioners, 38.7% of males identified with the comment “I had erotic reasons for wanting to transition”.
The figure for females was a third of this, at 13%.
 Littman, L. (2021). Individuals Treated for Gender Dysphoria with Medical and/or Surgical Transition Who Subsequently Detransitioned: A Survey of 100 Detransitioners. Arch Sex Behav. [Link]