As family norms, gender norms change more and more men are allowed and take the opportunities to stay home with their children. In most countries, men are allowed to share the parental leave given from 3months up to 3 years with the mothers. Also in many countries, such as Sweden, Denmark there are leaves that are ear-marked for men.(which means that they loose this benefit when they do not take it up).
This trend makes it easier for us to spot men with buggies alone on week day afternoons, doing shopping. Also men with young toddlers playing on the play ground on weekdays.
Anyhow, Jon la Joie wrote a song just for these daddies who stay at home and take care of their children.. quite hilarious, using heavy metal as the medium. However, the fact of being a stay at home dad? It will become more and more common... no joking matter.