6th grade science teacher mrs. samson asks her class: "who can tell me which organ of the human body expands to 10 times its usual size when stimulated?" nobody raises a hand, so she calls on the 1st student to look her way. "mary, can u tell me which organ of the human body expands to 10 times its usu size when stimulated?" mary stands up, blushing furiously. "how dare u ask such a ?" she says. "i'm going to complain to my parents, who will complain to the principal, who will have u fired!" mrs. sampson is shocked by mary's reaction, but undaunted, she asks the class the ? again, & this time sam raises his hand. yes, sam?" says mrs. sampson. "ma'am, the correct answer is the iris of the human eye." "very good, sam. thank u." mrs. smpson then turns to mary & says, "mary, i have 3 things to tell u: 1st, it's clear that u have NOT done your homework. 2nd, u have a DIRTY mind. & 3rd, i fear 1 day u r going 2 b sadly disappointed."