By this standard, marital relations in the infertile time are called into question, for there is pleasure and closeness, but it is naturally closed to life.
Pleasure and closeness is part of the marital sacrament at all times… it is the glue that binds. God made pleasure a PART of the marital embracel, but he did not make it the ONLY part of the marital embrace. There’s the rub, eh?
My take on the matter is that if don’t want to go to Toledo, you best not get on the bus. If you get on the bus and think you can hop off, then you better be prepared to eventually go all the way to Toledo, for the Holy Spirit works well with our passions, and sometimes we have to give a name to the “fruit” of those passions.
Perhaps this gets us into the “serious reason” question more than anything else. Why fear completing the act if you have the urge to “play”?
Sometimes I wonder if the knowledge given us by the practice of NFP leads us to believe we are the ones who decides we can “have” a baby. Only the Holy Spirit is the Lord and Giver of Life, and if you feel the urge to “show each other a little affection”, then perhaps it is the Holy Spirit blowing on the embers of passion. There are many who hope for a child in the fertile time who don’t receive the gift of new life, and there are many who think they know the limits of fertility, and from dancing on the edges find themselves with a blessing growing between them.
You know, the heart of the matter is the FOCUS. Is sexual play part of the complete giving of oneself, or is it a recreation? Many have danced around the actions and intentions of the marital embrace, and the target of the effort is usually what takes you off the mark with the Church.