Rich American parents, it seems, try to toughen up their children by making them do household chores.

ECONOMIST: Too much money can be bad for you in all sorts of ways

Some 18% just said they preferred going out to revising, while 21% said they would rather do household chores than revise.

BBC: One in three students wears 'lucky exam underwear'

As incomes rise, people are more willing to pay others to do household chores, such as cleaning, gardening or even walking the dog.

ECONOMIST: Light on the shadows

Several years ago, the massive American Migraine Prevalence and Prevention Study found that half of those who struggle with migraines can't do household chores and a third forgo family or social activities.

CNN: Stop that splitting headache

In general, women are still the primary parent, and they still do more household chores, which involves both physical work and a whole lot of mental work remembering appointments, planning meals, getting the paperwork in on time.

FORBES: Success Secrets Of The World's Most Powerful Women

These books allow her to select from coupons that offer her a dinner out or her favorite home-cooked meal, an uninterrupted night with the remote control or the ability to have you do any number of household chores.

FORBES: Best Valentine's Day Gifts For Women That Are Under $20

Do sons and daughters take turns doing certain chores so they both learn to be proficient in all household activities?

CNN: Why men should share equally in housework