"What do you think an ideal is"? I think it's the closest scenario possible to any of one's values, such as moral, political, psychological, aesthetical or affective. Usually it involves beautiful things, such as Art, world peace, abstract concepts, "pureness". It's an state of being where nothing is corrupted. But when I think of lonely people such as me, even a cute korean girl with moderate breasts calling me "oppa" could be an ideal, for example, even though it can't be as beautiful as what Greek philosophers or Buddha teached us. Anyway, let's go back to the korean gf example. It would be something like this:
— Oppa, koko ni irimasu ka?
— Yes, I'm here, honey. What do you want?
— Uguu... I want to give you a ぱいずり
— Say what?
— A ぱ•い•ず•り!Paizuri, you dummie 日本語-let!
— おー, naruhodo, naruhodo. Hehehe, WAHAHAHAHA! Come here, baby ＼(^-^)/
And the two of them start to fuck amidst that starry, beautiful night filled with hints of a gentle, shiny purple among the dark blue sky.

What a beautiful story, /bant/!