By nature, birth control works by changing the hormone balance in your body. I believe in most cases it makes your body think you're pregnant so that you won't get pregnant. It's probably this change in hormone balance that's causing this. There are 2 possibilities: it could be that over time your body will adjust & you won't feel so sexually charged. Some women have a drop in their desire when on the pill. The other possibility is you could ask your Dr. to prescribe a different BC Pill, it might be that a slightly different hormone balance would not cause this effect.