Guys, is sleeping on the second date a sign of not a serious relationship?

Anonymous
I met this guy from Tinder and on our first date we both got drunk and kissed, a lot. After that he kept texting how he couldn't wait to see me again. On the second date which was supposed to happen on a Wednesday - at his place which he cancelled and then on Saturday which he cancelled again. We finally met at his place on Sunday, we cuddled, had sex, watched movies and I stayed over. He texted me the next morning and we have been in touch. I am not sure where this is headed, is it even right to bring up the topic of - where are we headed so soon? Is sleeping on the second date not a good sign? He hasn't said - can't wait to see you/lets meet after that. Nor has he made any plans for the weekend yet.
Guys, is sleeping on the second date a sign of not a serious relationship?
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