@emMeBi86 Unfortunately he is also denser than Osmium.
On a side note, I would totally eat Prez's heart chocolate. I mean, it can't be any more 'disgusting' than Harry Potter's chocolate frogs. Those things jump for crying out loud.
@spurgleburgle
Agreed, I've always known it as obligatory (giri) and real/true (honmei) as well. Seeing it as duty almost makes it sound less like it's an option and more like you must give it, even though the two words are basically interchangeable. Weird how our brains can work.