The rates of masturbation have also changed after sex reassignment surgery for both trans women and trans men. A study reported an overall increase of masturbation frequencies exhibited in most transsexual individuals and 78% of them were able to reach orgasm by masturbation after SRS. A study showed that there were differences in masturbation frequencies between trans men and trans women, in which female-to-male individuals masturbated more often than male to female The possible reasons for the differences in masturbation frequency could be associated with the surge of libido, which was caused by the testosterone therapies, or the withdrawal of gender dysphoria.