Because let's face it; a doctor has a lot of years of experience learning to touch people gently in order to make them feel better. Prodding around to find a swollen gland, inserting tubes into unmentionable orifices, having to look at people's genitals and find out what might be going on in there: ok, so these aren't romantic acts, but they'll all contribute to your S.O's great sense of direction when it comes to your body. They'll know how far to go, and what your body's limits are, and how hard they can do this or how soft they can do that. Get ready for the ride of your life.
I love Stephen King and music festivals; I eat my toast upside down; I daydream about getting married probably a bit too much; and I wish every day for a pet sausage dog puppy (who never materialises – sob).