How To Fix The Gap In Between My Thighs?

Hi Im a 19 year old young woman, and i have been always wondering how to fix the gap in between my thighs, it swoops and my thighs only touch all the way at the top and than skips down to my knees, and my knees knock together. i thought maybe its the structure of my leg but even if i were to make them straight surgically it still wouldn't fill in the space needed, what can i do? is there a medical procedure or some kind of deficiency that i have? i need to know if its fixable and how?