Married coupes have to find ways to bring the spark back into their relationship.
You’re giving a different reason here (the monotonous sex life in a marriage).
Earlier you mentioned another reason…being uptight due to religious reasons. I’m wondering if religion could be used to make the person feel more comfortable.
What if the problem is with the more adventurous partner? What if that partner is overconfident about their abilities…and what he/she thinks is great fails to do anything at all for the other person?