Anytime a foreign substance enters the body whether it be for purposes of pain refief, high blood pressure, diabetes, or even hormones; to a degree your body is effected sexually. Whether it be decrease in sexual desire, vaginal dryness, or erectile disfunction. My suggestion is to speak with your healthcare provider if you are have problems of this nature. Another option is to visit your local "dirty" store. They carry creams, lotions, and oils that contain substances that when applied topically can cause blood to rush to the genitailia and may help to make sexual experiences more pleasurable and possible.  Good luck and talk to your doctor they  may be able to think of other ideas as well.