A dog trainer told me the reason dogs lick themselves is because they know that at some point they will be licking thier owners face. Kind of a canine “Gotcha”.
No, that is when the dog climbs up on the bed in the morning after the wife gets up and lays down only to pass the most hideous, corrosive gas.
Nothing like having a mastiff wake you up so you gasp for any clean air in the room.