Hi low desire
I think sexual desire does come from the brain. I dont believe we can truely love others unless we love ourselves.
whats your self image like? do you like your body? if you dont, then you need to work on yourself image.
buy yourself sexy lingerie, focus on your best assests, love yourself first, masterbate!
I had a poor body image, then I went to a nudist beach. an amazing experience, it helps you to feel comfortable in your own skin. If you feel good about yourself, feel sexy .... then the desire will come.
hope this helps.
Cheers
Flawed_gem