No thread jack at all. The title says "Abstinence After Marriage" so I think this is within the subject. Fire away.
My faith teaches that sex within marriage is sacred. We are uniting with God in the possible creation of new life. It's taught that marital sex is a renewal of the vows. In other words, sex is good!
My church reads a different version of the Bible, so our phrasing of 1 Cor 7 is slightly different, but very close. It's been interpreted to mean that denying a spouse sex without good reason
is a sin. Good reason generally defined as pain, exhaustion, illness, post adultery, in cases of abuse, to avoid pregnancy...common sense stuff.
Now, there is what is commonly called a "Josephite marriage". If both spouses are in agreement on indefinite celibacy after consummation, it's not sinful. However, if one spouse wants to resume sexual relations, the other would be sinning to deny without good reason.
Having good reason to deny is not a blank check, either. For example, say Wife wanted to have sex with Husband, but Husband had erectile dysfunction and denied her. Husband would be obligated to seek medical attention and do everything reasonably possible to correct the problem and resume sex with Wife.