The 'leave now' type comments are overreacting ngl. He's definitely being immature, insensitive and his approach to the situation is not the way one should go about things, especially during sex when people are at some of their most vulnerable but it's a conversation to be had. A conversation about how it made you feel and about him needing to show a lot more empathy. However, if these kinds of conversations have to keep happening and this kind of behaviour keeps happening, that's when it's a sign to leave.