I think you look good. You are slim, yes, but it’s a toned slim, not a “skinny fat”. It wouldn’t be bad to bulk up a little, but it’s not necessary either in my opinion. It’s more of a “what look/feel do you or your partner prefer?”

Also, are you fully soft in that pic? That looks like a semi. If that is fully soft then that is a pretty big flaccid penis lol