Be careful how you answer your children (joke)

[CanadianHummer]

heres a joke thought you may get a kick out of.

a little boy sees his mom and dad having sex and asks his mom "what were you and dad doing"
the mom says "well you know how dads trying to loose weight? thats how he exercises.
the boy looks at her and says" mom its a waste of time"
the mom says "why?"
the little boy says "because as soon as you go to work the neighbors wife comes over and blows him back up