It’s a familiar exchange to many women: “I love your dress.” “Thanks, it has pockets!” So coveted is the spacious inset pouch in womenswear that when they exist, they are likely to attract attention.

At Paris Fashion Week, men stepped out in heels, from pumps and slouchy boots on the Vivienne Westwood runway to the chunky loafers rapper and actor Jaden Smith wore as a guest at Louis Vuitton. It ...