As a statistician, I have to chime in, you guys are all wrong on the math. With multiples, it isn't times the number of kids, it's to the power of. So having 3-year old twins isn't 6 parent-years, it's 3(exponent)2=9 parent-years. My twins are 5, so it's like I've had them for 25 years, heh heh. My sister-who-has-twins warned me of this, and so far it suits!