gotta love salmon and tuna nigiri

That does look quite appetizing.
I had sushi the other day, and there was a lady sitting in the next table and she was
drowning her delicious looking tuna sushi, rice side-down, in soy sauce with wasabi. And when I say drowning, I'm not joking... After shoveling the soggy, disintegrating rice blob into her mouth, she'd making funny noises. Occasionally, she'd moan "oh, this is so good" between bites, too.
I'm not big on sushi etiquette, and if you prefer to put soy sauce on the rice instead of on the fish, more power to you, but yikes!