I'm sure there's variety among Jewish cock, but my friend David, who is Jewish, and I hooked up once when we were in P-town in the winter. We were friends and hadn't ever hooked up before this night. We were staying at a B&B with a hot tub. It was mid-January, so we went out into the winter air, ran to the hot tub which was under the stars in the back yard, and dropped our clothes. He was staring at my already hardening cock and said, "Oh my god, you're huge!" I guess the light from the nearby street lamp had given him a glimpse. I laughed and jumped into the tub. He sat on one side, I sat on the other. I couldn't see his cock yet, it was so dark, but fairly quickly we started playing footsie in the water and eventually I found his cock with my foot.
My jaw dropped. It was enormous. It was easily nine inches and extremely thick. He said, "Yeah, I know. It's big." We laughed. I said, "I can't believe you think I'm big." Dave is a short guy, like me, less than 5'8. We ended up making out and rubbing our cocks together in the hot tub and jacking each other. Not cumming, just jacking. Then we moved to the bed inside the B&B and jacked each other off. I loved seeing his thick one shoot cum all over himself.
Wish I could live that night over again!