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.
Doctor Kinsey oli kuulnud -- ja sellel ajal, ehk 1940ndatel, liikus ringi teooria, et jõud, millega sperma vastu emakakaela tõugatakse, mängib viljakuses rolli.