I'm really tempted to get out my sarcasm detection meter
Having said that, greatness if you love these; totally.
Offering of Cake
Your offer of cake and other assorted sugary fare influences your enemies' attitude to a more agreeable Friendly; their initial attitude can be anywhere from hostile to unfriendly to indifferent. Enemies now try to help you, albeit in a limited manner, and will also advocate on your behalf. Additionally, you gain a +4 cake bonus to Diplomacy; this in effect in any situation that warrants its use. 3/day, with cake in hand, you may also speak words that have the same effect as a charm monster spell.
The Cake is a Lie
You cause a geas/quest effect to take form, and can manipulate any targets with promises of moist cake. Any action your target takes that is at odds with your request or requests imposes 3d6 penalties to the applicable ability scores each day.
Any time, you sing this song, your target is fascinated (as the condition) and under a suggestion. The song must be sung in its entirety and without error.
At the end of the quest, you may reveal that the cake has been and always was a lie; the target is always unwilling when this takes affect. This reveal causes the target to be at first, stunned (as the condition) and then raging (as the barbarian's; at their class level).