Of course, it's a Heinlein staple. I do think this work suffers from a lack of cohesion, so although I give it points for pushing several of Heinlein's themes hard and well, it's a hard novel to grok unless you're on the Heinlein page to begin with. Still, the characters are so strong as to be forceful, and we do get a potent view of sexual libertarianism. A man truly ahead of his day.