It is very polite of him to ask first.
The height difference between them makes the whole situation both cuter and more painful.
If you're wondering what Joseph meant by "the deal" on the previous page, it'll be explained by chapter's end.
It's even funnier if you imagine Eddie asking Pearl to make him a sandwich instead of for a kiss. XD
"Hey, Pearl....may I tell you to get me a sammich?"
@The_Hankerchief: LOL. XD Oh, Hanklin, you and your ideas.
@The_Hankerchief: I believe the correct order is kiss - marriage - telling to get sandwiches, that's how it usually works! :D
@Oly-RRR: First comes love, then comes marriage, then comes mommy with a hoagie samwadge.