Where's the nit?

Oh, no!...no nits here! Just that you must be so busy out picking nits, them being in season 'n' all, that you missed this delectable Latin citation..."the lure of the nit" is the onliest thing I can think of that could've distracted you from that! Sheesh! Do I have to start 'splainin' all my punchlines like Leno?