what about people that'd don't want children? Where is our (full/part) paid time off? This is the same problem restaurants have with smoke breaks. You have to give equal breaks to non-smokers.

It seems the simplest solution would just be to offer X% paid time off per Y yrs of service regardless of children/no children with the rule the employee gives the company Z months notice. That way male/female parents can figure out who stays home with kid and childless workers get the same benefit. It is basically like a sabbatical university professors get to go refine their skills. Employees get a certain amount of time/pay to go do 'life' things based on service.