in that for many people, the thing we can do with it that is most pleasing to God is… absolutely nothing. Are there other gifts we have that are similar in that respect? Is there anything to be learned from viewing sex from this perspective? Is my observation wrong?
It it not
nothing to exercise self restraint. For example in The Enchiridion Of Indulgences the third general grant is a partial indulgence granted to the faithful, who in a spirit of penance voluntarily deprive themselves of what is licit and pleasing to them.
This third grant is intended to move the faithful to bridle their passions and thus learn to bring their bodies into subjection and to conform themselves to Christ in his poverty and suffering.
From The Enchiridion Of Indulgences:
But self-denial will be more precious, if it is united to charity, according to the teaching of St. Leo the Great:
“Let us give to virtue what we refuse to self-indulgence. Let what we deny ourselves by fast – be the refreshment of the poor.” [Sermon 13, *On the Fast of the Tenth Month, 2: PL 54, 172.]
*Lk 9, 23: *If anyone wishes to come after me, let him deny himself, and take up his cross daily, and follow me. [See *Mt 10, 30 and *Lk *14, 27.]
*Lk 13, 5: *Unless you repent, you will all perish in the same manner (see 13, 3).
*Rom 8, 13: *But if by the spirit you put to death the deeds of the flesh, you will live.
*Rom 8, 17: *Provided, however, we suffer with him that we may also be glorified with him.
*1 Cor 9, 25-27: *And everyone in a contest abstains from all things, and they indeed to receive a perishable crown, but we an imperishable. I, therefore, so run as not without a purpose; I so fight as not beating the air; but I chastise my body and bring it into subjection.
*2 Cor 4, 10: *Always bearing about in our body the dying of Jesus, so that the life also of Jesus may be made manifest in our bodily frame.