What would happen if sex was interfered with the way birth is interfered with?

Oxytocin is the ‘love’ hormone produced during intimacy, during labour and during birth. This single hormone is the most important guy behind the normal physiological functions of all three.
Oxytocin is directly inhibited by stressful conditions and situations of feeling observed/judged.

Can you imagine if sex was interfered with the same way birth is being interfered with?
Is it any wonder labour stalls or becomes harder to bear in environments where we feel uncomfortable?