Volume 7, Book 65, Number 366:
Narrated Ibn 'Abbas:
The Prophet said, 'When you eat, do not wipe your hands till you have licked it, or had it licked by somebody else."
1) Was the food Mohammad ate finger licking good?
2) Was Mohammad an expert in hygiene?
a) Did Mohammad want to ensure that food stains would not be wiped on his garments the same way his semen stains were smeared on his clothing? http://muslimhadith.blogspot.com/2008/05/mohammad-had-lots-of-semen-on-his.html
b) Why didn't Mohammad also order the cleaning of food the same way he would clean himself after Janaba (Sexual discharge) by washing his hands and then by putting two fingers through his hair?
i) Better yet, why didn't Mohammad order that the semen be licked the same way food was cleaned?
3) Was Mohammad encouraging other people to lick his hands the way a dog licks its owners hands?
a) Or was Mohammad, being the sexual libertine that we all know and worship; the prophet of love; foreseeing the days when lovers would dip each others fingers in a sensual dessert, and lick each others fingers with amorous glows? Afterall, it is "Allah Almighty, who causes hearts to turn!" Tabari VIII:1 (Reference was when Mohammad saw his adopted son's wife, fell in love with her, and forced his adopted son to divorce her)