A few years back, when my daughter was about 1.5 years, I was traveling on biz trip to Asia; flying LH.
I got the business seat cause of work and I bought my wife an economy class ticket to travel with my daughter.
We took our seats, planning to talk to the FA, after departure of the flight to change our seats.
The part of the plane that my wife sat with my daughter was a window two seat side, so there was a man sitting next to her in the aisle.
I took my seat and told my wife and daughter to take theirs. When my wife took her seat with our child...I could see the aisle guy's expression that he would have to sit 9+ hours with a 1.5 year old lap child.
He did not look too pleasant.
Understanding this, I just went up to the purser and asked if we could just switch from the very beginning...I would sit in the window and wife would take the business seat. Purser says "no problem"....you should have seen the guy's expression of joy, when he heard that my daughter moved to business class with my wife.
Too bad...I could not sit with them....