Most Intimate Part of Anatomy

@JP1 i absolutely agree that the glans is the most intimate male body part. I think circumcision is so erotic because it permanently exposes a body part which is both visually spectacular and very private.

I would have to say that my testicles would be my most sensitive or stimulating thing that my doctor examines when I go for my physical. The sensation of him feeling my testicles with his gloved fingers always leads to me getting an erection. The pressure against my prostate when he does my DRE's would be a close second.

My testicles are very sensitive to even the slightest bump. I’ve never had any issues with medical exams. I have a female doctor, who would never examine my private parts, unless there was a medical condition.

Anus 100%. When I was a teenager I had some pelvic/rectal pain. I was mildly embarrassed by the genital exam but it would fade quickly. My penis and testicles were parts that others had seen my whole life. But when I had external and internal anal exams, I would be mortified. That's an area no one sees, I hadn't even seen my own yet at the time. The feeling of my cheeks being spread and the cool air hitting a generally ignored body part would have me blushing every time.

I would have to say, not in any particular order, three related spots:

Anus, peritoneum (taint), and prostate.