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Housework doesn't get you laid. Hormones get you laid. Having no kids (a.k.a. lots of free time in the morning/noon/night) gets you laid.
It's nice for ANYONE, male or female, to take a night off and be pampered and taken care of. That's why restaurants and babysitters exist, so partners who wind up being "stay at home" parents can also get time off from doing those "chores" that are part of their role.
This is another ridiculous sociological study. Are there no more relevant subjects on which to spend budgetary dollars anymore? Have all the good theses been snatched up and written about?
Talk about non-news. Go back to work people...nothing to see here.