The Capacity for Pleasure
The truth is that you have the same working parts that everyone else has, and that is all it takes for great sex. One culture will love big bottoms, another will love small breasts, and yet another will prefer hairless men. It doesn't matter what happens to be in vogue in your present time and place. You've got what you've got and your friend has what she has.
When you realize this, you'll be free to be in your body and experience what it is capable of. When you consider that your brain is your biggest erogenous zone, you start to think about how little you might actually be feeling, and you can begin using your body to its fullest pleasure capacity. When you get past focusing on your shortcomings, then you can begin to have access to your full pleasure.