Keep Wanting More?

So, I had sex with my BF, 4 rounds in 1 night, each round lasts from 15mins to 25mins. However, after these 4 rounds, I still kept wanting more of his dick...

Waking up in the next morning, I still kept wanting more of his dick...

Is this a sign of sexual dissatisfation?

I have never reached orgasm in my entire life, even though I started mastubating 10 years ago. When having sex with my BF, it felt extremely good but still I didn't climax.