Losing half an ear is not consistent with needing no stitches. I can assure you, as the child of a U.S. Navy ENT who also specialized in maxillofacial surgery, I have enough tangential awareness of ear injuries to know we don't have the real story. He wouldn't be out of the bandages so quickly.
Lots of little capillaries in outer ear, they bleed profusely when cut. Should have used a bigger sponge to get some 'blood' on his crisp white shirt when Trump pressed it to his ear for the Hero Shot.
@weezmgk @CStamp This was the part that stuck out to me: Trump is claiming there was so much blood, but not a speck on that white shirt collar. In other words, the wound had already clotted by the time he stood up.