The only time we've ever really had "make up sex" is after we split for a few months a few years back. When we reconciled it was by FAR the best sex we've had ever, for a few weeks. There were definitely some intense and passionate feelings fueling those sessions. But, I'm not about to go kicking him out every now and then to keep things hot and heavy! If we have a disagreement or argue, we don't generally ever have make up sex, and typically don't have sex until the next day or so after.