Catholic sources explain that it was in the second century C.E. that professed Christians first adopted a Stoic rule according to which the sole lawful purpose for marital intercourse was procreation.
ಆ ನಿಯಮದ ಪ್ರಕಾರ ವೈವಾಹಿಕ ಜೀವನದಲ್ಲಿ ಸಂಭೋಗ ಮಾಡುವುದರ ಒಂದೇ ಒಂದು ಉದ್ದೇಶ ಸಂತಾನೋತ್ಪತ್ತಿಯಾಗಿದೆ.