He says his penis is too sensitive

So, I've been dating this guy for a while now and we've been talking about sex, specifically oral. But, he was telling me that the tip of his penis is so sensitive that even him touching it is too much sensation for him to handle and so it becomes uncomfortable rather than pleasurable. He's even had to go see a doctor because of this issue. We've been talking about the idea of a blowjob, but I'm kinda scared he won't be into it because he's so sensitive. What should I do? Does anyone have tips or techniques I could use to make it pleasurable for him? Thanks!