This is so true. A silly example. If you give a child a big bag of sweets all in one go he/she will be very happy for a little bit. But he cannot "consume" that

This is so true. A silly example. If you give a child a big bag of sweets all in one go he/she will be very happy for a little bit. But he cannot "consume" that happiness all in one go. The child's happiness level is saturated. So if you spread out the giving of sweets, the kid gets a constant trickle of smaller happy moments. Overall after all the sweets have gone, the kid who got given the sweets one by one, would extract more overall happiness from that bag than the one who had it all in one go.