Am I not masturbating right? TMI

I own a vibrator, and i use my fingers. I know what makes me feel good, and what i like, and i thoroughly enjoy sex. But i NEVER really enjoy masturbating/get off? I usually just do it for SO's entertainment, since he likes to watch me do that kind of thing, and honestly i hardly really enjoy it. Keeping my lips open to the atmosphere like that (observed or not) dries me up REAL quick and then i just get sore. :L i hate this because so many woman only get off from masturbation and I can't even enjoy it. Am i doing something wrong? I have tried lube, other forms of penetration (dildos) and vibrators. Just really fristrated 😞