One kind expands and lengthens when becoming erect (a grower). The other appears big most of the time, but doesn't get much bigger after achieving erection (a show-er).

Pope made tea rhyme with obey, as indeed many an Irishman and Britishman would now. We are liable to fall into the use of provincial expressions by reason of such discrepancies.

There he stood, very quietly overlooking some sailmakers who were mending a top-sail in the waist.

[…]the white women, several of whom had been watching the massacre of the Negro men, pounced on the Negress. I do not wish to be understood as saying that these women were representatives of the womanhood of East St. Louis. Their faces showed, all too plainly, exactly who and what they were.