This same thing --- call it "love-making life" or "life-making love" --- really conveys respect for God's design.
This is not negated if the couple are naturally infertile. Natural sexual relations between a husband and wife always have the significance of "this is the life-giving act" even if the act naturally does not or can not produce a baby.
That's why husband and wife past the age of childbearing can certainly still enjoy sexual union. But they shouldn't do perversions which are not the life-giving act (e.g. ejaculation into the anus or other acts of sodomy which I very much don't want to describe.)
They should also not do any perversion which, while it is procreative, is clearly not a love-union, such as intentionally fantasizing you're with somebody else, e.g. having relations with your wife while viewing porn; or, for that matter, marital relations deteriorating into rape.
It is part of the privilege of being human that we are cooperators with God in this way: love and life blossom together, they are not intentionally split-off from each other.
Anyone --- even a seemingly unbelieving scientist --- who looks more and more into how sexual love "works" becomes more and more impressed with God's design, which is exquisite.
Great tagline.