It took me until my 50s to stop being self-conscious about my slender body and skinny arms. Exercising more helped a bit but it was mostly in my head. My advice - love yourself now! (The sign was for a Twitter pro-nudity campaign)
36/M 160 lbs. talking to a friend about insecurities. We all have them. I have long been insecure about my body hair, narrow shoulders.. and if being honest, size of penis. But, they put themselves out here so I will too.