My parents found my arm scars...

Im 18male. And I wear a robe all the time for comfy lounge wear. And my mom asked me to take it off to see if there were cuts and I said no. And my dad said for me to show her. And I kept denying it. My dad went up to me and started grabbing me and my arm and robe to pull it off. I got myself to the kitchen and my mom and dad were pulling at it and I kept clutching and leaning forward clinging on to my arm sleeve. And I said "fine ill show you" so I showed them and my mom let out an audible gasp. And my dad just seemed kinda upset but not mad. My mom was crying. But they werent mad..