My son reluctantly went when I asked him to try it when he was 14. After one session he told me it made him very uncomfortable and that he never wanted to go back. At 21 he said he’d like to try it again. He started a few months ago. He told me he really likes the guy and that he’s helping him.
Key for my son is talking to a younger male therapist (now) rather than an older male therapist (then). I think he had to be ready but I also think that trying it at 14 even for only one session helped him decide to try it later.