Well there is an explanation for your oily scalp. It is because when you used to have a full head of hair, the oil that your scalp produced was able to oil the hair that was growing leaving your scalp not that oily. Now since your hair has thinned or even fallen out, your scalp still produces the same amount of oil, but it has no hair or not enough hair to oil it, hence it is left on your scalp.
Whether that causes even more hair loss, I don't know, but I have heard that it accelerates the hair loss because it blocks the pores on your scalpâ€¦ I don't know if that is true
Oh, sorry to correct previous claims but, masturbation can cause baldness. That is because we loose zinc when we ejaculate and zinc deficiency was linked to hair loss in many studiesâ€¦