Sex and Love - What's the Difference?

Some of the nicest, hardest working and best people i know are gaze in long term relationships. Why do people try to make the claim that sex and love or two different things? Sex can be purely physical, can be totally divorced from your values because it's all about pleasure. And then he adds at the end, i have to say, actually, i'll say this in a second, because i have to get to the super chat we have.