All my NT friends can go for months without sex without going crazy.
Anecdotal evidence.
Even the most careful sociologists and psychologists who specialize in sexuality have great difficulty in designing reasonably objective and accurate questionnaires. Self-reporting about sexuality is as rife with untruth as is self-reporting about diet. That is why sexuality studies posing similar questions but designed by different investigators yield greatly varying results. For example, we don't yet have a definitive number for the percentage of gay people in the population.
A hypothesis: The NT's you attract as friends have particularly depressed libidos. (If they are, indeed, NT's, which you don't really know unless you test them.)