Hi Doctor, I’m Rahul. I’ve been facing premature ejaculation for a few months, and had erection issues during the first time with my new partner. Since then, erections are mostly fine, but I overthink before sex — whether I’ll last or get an erection — and that causes early ejaculation. My testosterone, sugar, and cholesterol are normal, but Vitamin D and B12 are low, for which I’m taking weekly nano shots. 1. What could be the cause of pre-cum and premature ejaculation, if testosterone is normal? 2. Can Vitamin D be taken weekly long-term, as it helps with testosterone and erections? Thanks, Rahul