What they said about engorgement, and I do the thing someone else described as 'cigarette fingers' where you pinch your aerola between your first two fingers like a cigarette, which makes it really easy to shove a good mouthful in there even if they don't have their mouth open very far. That particular grip keeps your fingers out of the way.

Turns out I've been doing this the whole time with DS (who is a lazy attacher) and DD#2 has been watching so now she's developed this habit of coming up, grabbing my nipple in that hold and shoving the baby's head down when he's just happily there staring at me and smiling. Argh!