"Is he a 'man?' I wonder.  This poor ersatz Martian is saying, by your own report, that sex is a way to be happy together.  I go along with Mike this far: sex should be a means of happiness.  The worst thing about sex is that we use it to hurt each other.  It ought never to hurt; it should bring happiness, or, at the very least, pleasure.  There is no good reason why it should ever be anything less.