I heard about the cake thing too but didn't see it. Nobody seems to want to replay it.
They showed it a while after he was drafted.
It was exactly the same thing you would see at a wedding. Groom goes to feed cake to the bride, and smears it on her face, then the bride smears it on the groom, and then they kiss through the cake smears.
It really wasn't any more awkward than any wedding scenario. It seemed totally out place at a draft party instead of a wedding however.