Men; Did I do a good job blowing him?

This guy has had a hard time cumming from blowjobs and through jntercourse with girls in the past. (I've known him for years before we started dating so no he's not lying, it's a real problem for him) BUT the last time I gave him a ******** he came! And I kept sucking and stroking during his orgasm and I swallowed and as I kept sucking and not stopping he threw his head back and he stayed hard! So I just kept going and finally I had to take a break so I massaged his tip a little with my fingers and he said "wow you're such a trooper" that's when he laughed and said "that tickles" and I said "oh I'm sorry" he said no it feels good. So I said "you want me to stop?" And he said it's totally up to you I mean I already came lol but you can keep going. I stopped bc I was at it for awhile and he already came & I swallowed it.

Afterwords he had a big smile on his face and he said congratulations you just joined the EXTREMELY exclusive club of making me ***. But my question is in the past guys have been so sensitive after they came they tell me to stop and then they say how amazing I was etc. They twitch or moan or praise me. This guy stayed hard & didn't tell me to stop. Do you think it felt good to him? Why was he able to stay hard?