LOL...this is from the FixCats website...
<< With her sleek coat, wide-eyed stare, and "Like I care" attitude, your precious Princess really does behave like royalty. But put off having her spayed and every six months, she'll transform into a feline floozy, caterwauling and sending come-hither pheromones to every tomcat within miles. Her bizarre body contortions will have you wondering if she's part pretzel, and her yowls might shatter the stemware as well as the silence. Besotted boy cats, helpless to resist, will camp outside her quarters, and yours, until her "heat" subsides. >>
and...
<< Tomcats make boys look like angels. Keep your unneutered Max indoors and he'll turn into a sex-crazed madman who "marks" his territory (your La-Z-Boy) by spraying it with his pungent urine. Put him outside and he'll disappear for days, only to come home (if you're both lucky) with abscessed ears and a scratched-up face. >>