Doctor Kinsey had heard -- and there was a theory going around at the time, this being the 1940s -- that the force with which semen is thrown against the cervix was a factor in fertility.
Doktor Kinsey slyšel -- kolovala jistá teorie v té době, bylo to ve 40. letech, že síla, kterou je semeno vrženo na děložní krček ovlivňuje plodnost.