Quote Originally Posted by ssgreg View Post
bash:
ххх: Биологи доказали, что тараканы могут жить без головы! (ссылка)
ууу: Могут. Но в голове им уютнее.


Note that "У каждого свои тараканы в голове" basically means "Everyone has his own personal quirks." It's not necessarily equivalent to English "to have bees in one's bonnet" (which implies emotional agitation) nor to "to have bats in one's belfry," which implies insanity.