He's not used to having anything bigger than 3 inches inside his pants.
Some of us get the train or leave the house other than just to go to work and I've never come across a pair of men's trousers that couldn't fit a 5 inch phone in the pocket. Women's sure but that's what handbags are for.
Bought today simple phone with buttons. Still can't figure out why the hell do I need mobile internet while driving from work to home and where to buy pants with giant pockets to accept all those 5" smartphones