well, I don't know what does it really mean in Egypt, and I'm not sure if it indicates that you're so delicious or sweet.
But in Syria, we use it to imply the silliness in the person when he comes with a ridiculous joke or something
trying to make fun of him
hey, do you come in another flavor ?
means : can you get any better in this ?
I hope it wasn't told to you in that context :)
And if you are thinking: yes, we - the Syrians- are rude with each other and gentle with the others.
And this is exactly what made the war in Syria.