"Yes," agreed Mike. "You grok God." He thought happily that this was nearer to putting the concept across than he had ever managed before except that Jill was learning it, in Martian.  Which was inevitable. "That's the idea, Michael.  God... groks you - and you are married in Holy Love and eternal Happiness to His Church.  The priest, or maybe priestess - it can be either - kisses you and then the kiss mark is tattooed on to show that it's forever.  Of course it doesn't have to be this big - mine is just exactly the size and shape of Foster's blessed lips - and the kiss can be placed anywhere to shield from sinful eyes.  Lots of men have a patch of skull shaved and then wear a hat or a bandage until the hair grows out.  Or any spot where it's blessed certain it won't be seen unless you want it to be.  You mustn't sit or stand on it - but anywhere else is okay.  Then you show it when you go into a closed Happiness gathering of the eternally saved."