Watch some kama sutra...Porn

You sit astride his hips and more than likely manually insert his penis.
Lower your self gently.

Then once there you can either remain in the upright position and carefully thrust your hips back and forth or you can make small circles with your hips. If you rise and lower then try not to make your movements too big until you are practised otherwise you risk him falling out.

You can lean forward or back as well.
Just keep your hip movements small until you become more skilled.
It also helps if he bends his knees up.
Facing him is easier than facing away from him.

Have a look at this previous post on the same topic (woman on top)...


Http://ehealthforum.Com/health/topic74606. Html

In the past i've been able to do woman on top with minimal problems! The guy i'm with now is a big guy (body wise) would this have anything to do with our difficulity!?

Usually it's easier for the woman to be on top if the guy has a large bodily build. My boyfriend is also a big guy in that sense and I find it more comfortable to be on top than the other way around. As far as an explanation...I don't think I can explain it better than kia did. But if you need a visual aid, check out some porn.

Ooh just had a thought.
If his body build is making it difficult for you to get any space between your groin and his and therefore difficult to move up and so forth...

Try placing a small pillow under each knee (yours) to raise you up a bit.

Or (if you have good strong legs) squat over him instead of kneeling.

Being a guy with a smaller penis (4.5") her on top works best. It tends not to slip out as much!!