Most Helpful Girl
Most Helpful Guy
From the results it does seem the more older the more difficult if you lack any prior experience or completely lack Any experience at all.
For girls and women it gets harder after 35 or somewhere around there and later because of that whole biological clock thing. But if they really do not want kids then that may not be such a big deal provided that they eventually find a guy that also does not otherwise it's a complete deal breaker and would be a total disaster.