A good sex life does not lead to a good marriage, but rarely is there a good marriage that doesn’t have a good sex life. If a couple has problems with sexual intimacy, it is often an indicator of deeper problems in the marriage. A challenge like this can reveal much about attitudes and apprehensions in a marraige and can be a useful tool to spotting a problem (even if a couple can't successfully meet the goals of the challenge, it can be a learning experience and hopefully it will be fun as well).
It’s a communication thing. Many times, one spouse will decide sex is unimportant to the relationship. The other spouse reads that as permission to go outside the marriage for satisfaction. Sometimes it is sex and sometimes it is something else.
I hear men say “My wife lost interest in sex so I took up fishing”. The wife tells her friends “All he does is go fishing”. When she tells him “Maybe if you stayed home more, we’d have sex more often”, all he hears is the “maybe”. Why trade a bird in the hand for one in the bush? But he tries staying home more and finds the sex doesn’t happen. So he sticks with fishing. Both couples end up waiting for a quid pro quo.
My wife will nag me to quit drinking and I’ll say “Ok, then we can have sex more often”. Then she goes and gets me a beer. Sweet life.
>>A good sex life does not lead to a good marriage, but rarely is there a good marriage that doesn’t have a good sex life.<<
Precicely! And I have lived both sides of that. It’s a fact!