Yeah if he doesn't want to fuck it is not really a good sign. Relationships that last long to lifelong times have sex the first date over average.

So it is indeed not too much of a good sign of people do really not want to sleep with each other on the first date.
Either the people are not really into each other and try to force a lustrelationship none of them really wants or they are compulsive and have possibly issues with superstition.