Is the Penis inside skin supposed to be hard and kinda wrinkly after ejaculating? -

Mine is. Its still the same colour but it just goes hard and wrinkly.

If it gets wrinkly then your penis is not reaching it s full potential. Your penis is wrinkly and squishy when not erect because there is not blood running though it. If your penis is hard but still wrinkly that just means that there is still room inside your penis for blood to fill, meaning that it can still get bigger. E-mail me if you have more quetions