My dermatologist told me to stop masturbation asap as it's the main reason of hairloss in men as it causes higher dht levels, is that true?

Think about it...: Hair loss is unrelated to the number of people present during one's sexual activities, nor related to whether one's genitals are being stimulated by one's own hands or the hands of the other people present. Thus, one's body does not know whose nor how many hands are engaged in the activities. The body knows masturbation only as sex. So, are bald men having the most number of sexual events in town?