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 havde hørt -- og der cirkulerede en teori på det tidspunkt, dette var i starten af 1940'erne -- at den kraft hvormed sæd blev kastet imod livmoderhalsen var en faktor for fertiliteten.