Sharing pleasure with a partner is considered an act of love by many people. So your assumption that it is meaningless is... well, maybe you don't connect with your partner that way.
As for the "price tag", putting price on certain things is quite sad.
You claim that you see no reason an inocent live should pay, but that happen when a child doesn't find donnors, or it becomes hungry because the mother is abandoned and gets not childsupport. Or because she didn't have money for doctors who treated her during the pregnancy. Or has no money to feed the children healthy food. Yet, your problem is with people having pleasure.