I'm tempted to say TOO MUCH SEX has too little sex. Too little to compensate for the lameness of the comedy and for the amateurishness of the actors. But maybe it's a question not of too little sex but of too little sexiness. The female lead is plain, in a rather masculine-looking way. That's no sin, except in a comedy that has no other kind of charm to offer. The best that can be said is that it attempts to point a respectable if shopworn moral: that the answer to the fear of death is the redemptive power of love. It's sort of like ALL THAT JAZZ rewritten by a bunch of not particularly intelligent or talented high-school dropouts.