Transhumaist question.

For those who prefer, should human sexuality be done away with? Machines could produce a million babies where a man and woman might produce 3 or so or none. Each baby genetically perfect, enhanced even. 10 times smarter, stronger. A life span of 300 years or more. No more disease. Why should we wast our time with this brutal work of reproduction? All the emotional pain of these relationships? Being tied together with someone?