Ex is saying I never made him cum

So my ex boyfriend wrote this book like 6 months ago. I had really no idea what it was about and judging by people who read it... They didn't understand the point if the book either. The title had absolutely nothing to do with the book and every chapter was something completely different, like I've chapter would be titled something like Red and talking about the reason he loves read, and the other is titled orgasm. My step sister read his bed and has been getting the whole family to or rather the orgasm chapter. She thinks it's hilarious since we dated for 5 years. I read it and it pretty much said he's never came before in his life except his sleep. He goes into how during sex he would water 20 minutes and then take an orgasm. He always told girls he cums very little so they shouldn't be surprised if nothing came out. He talks about how he never really masturbated because that was severely frowned on and he thought he would go to hell and only one girl has ever gotten him close and it was a girl he slept with after a break up in a 5 year relationship (aka ours). He didn't name any names but I just found this so offensive that he faked orgasm with me and made me believe I was so good at sex. Then talked about some of the worst blow jobs he's ever received and one if them I knew was about me because it was on our 3 tear anniversary and I "apparently" bit him by mistake. This whole book is embarrassing and I can't believe my step sister convinced my family to read it. Then the next chapter is about worshipping a flying spaghetti monster and he must have been off his ADHD pills when he wrote this shit.

Edit: Masturbation got ruined for him the first time he tried beca his mom caught him and he had to admit his sun to the whole church.

@Brea I know I should let it go. It just bothers me. And lol yeah that chapter wasn't about him worshipping it. Just that he found the religion interesting.