Pansies (Lawrence)/Conundrums

CONUNDRUMS
Tell me a wordthat you've often heardyet it makes you squintif you see it in print!
Tell me a thingthat you've often seen,yet if put in a bookit makes you turn green!
Tell me a thingthat you often dowhich, described in a storyshocks you through and through!
Tell me what's wrongwith words or with youthat you don't mind the thingyet the name is taboo.