the Catholic Church before Vat 2 instructed that sex was for the production of children, that was it...then it changed to "and for the mutual pleasure" of the two married people , paraphrasing here....
if you really really think about it, our culture all started down hill when sex was not connected to having babies...the pill, abortion, divorce....the totally shameless paganistic society we so much detest, at least I do....
You’re right.
Nor are those considered as acting against nature who in the married state use their right in the proper manner although on account of natural reasons either of time or of certain defects, new life cannot be brought forth. For in matrimony as well as in the use of the matrimonial rights there are also secondary ends, such as mutual aid, the cultivating of mutual love, and the quieting of concupiscence which husband and wife are not forbidden to consider so long as they are subordinated to the primary end and so long as the intrinsic nature of the act is preserved. (Casti connubii)The problem arises when someone tries to use this secondary end to justify violating its primary end.