I'm a 65 year old male. As I got older, my orgasms became weaker and weaker. Until I discovered a technique for making them strong again. It works like this:
As you get close to coming, make like you're going to pee. Don't worry, no urine will actually come out. Increase the peeing effort as you get closer and closer to orgasm. The pressure will keep building and building until you can't stand it any longer! I guarantee a mind-blowing orgasm.
I'd be interested to hear if there is a female equivalent to this technique. Probably not, because in the male, it has to do with valves in the urethra that control whether urine or semen is allowed to come through.