I need sex advice!!! 24 and married!

Erin
I'm 24 and married (just a background idea). I've been married for a year and a half. My husband and I have been together almost 5 years. Our sex is always amazing..... however, I find myself having a hard time having an orgasm without a vibrating ring. I want to have orgasms naturally through just sex (no toys included). Do you have any advice for me? Please don't say porn... we don't believe in watching that (religious beliefs). Thank you in advance. Again, sex is always great and feels good, just can't get stimulated enough to "finish". I want to actually get weak to my knees and legs shaking! Haha