Really need some male advice!

An

My man says the head I give him is great but he has never came from it alone! Previous guys I’ve been with have, but he has to finish himself off after like 20 mins because my jaw hurts and I feel like a failure🤦🏼‍♀️

HOW CAN I MAKE MY BF CUM FROM HEAD? (I’ve asked him and he is exceedingly unhelpful)