Disclaimer: I don't own Naruto, also I've never actually watched iron chef...

The cat that ate the canary Neji/Hinata:
She had never managed to win a sparring match against Neji. Perhaps she would never be able to beat him using the clan techniques, but for this match, she'd made a plan, it would only work once, but that was all she wanted.
She let him seal her tenketsu, not that she had much choice really, then the moment he paused to start his usual speech she punched him. It was more of a brawl than anything, certainly not something her father would have been proud of, but come the end he was beneath her and she was triumphant.

Pregnancy sex Gai/Shizune:

His strong hands cradle her more carefully nowadays, they can still have sex, but Gai's protective instincts demand that it be slow, just in case. She misses her bruised hips and the sound of the bed slamming into the wall, but there is something alluring in the aching frustration that makes it last longer than it has ever done before.
No it isn't the same as the vigorous, rough, satisfying sex of before. Still there is a lot to be said for writhing in sweaty ecstasy that keeps you balanced almost perfectly on the edge beneath a beautiful man.

Iron chef ramen battle Kushina:

Minato didn't take it seriously when Kushina said she was going to go on a cooking program, all he'd ever seen her cook was instant ramen, and he wasn't sure that could actually be considered cooking.
2 weeks later she was an Iron Chef, she could use any ingredient as part of a delicious bowl of ramen. He sighed, he would have argued against it if he had known she would be gone this long.
3 days later there was a knock on his door, he opened it to find Kushina there, "They said I had to make something else..."

Painkillers Konan/Nagato:
Konan slides them into sandwiches, dissolves them in drinks and stirs them into soups. Somehow it is as though they aren't there, as if this isn't happening if it isn't mentioned. He knows what she is doing, catches the anxious - scared - looks she sends him whenever his joints are a little stiffer than usual.
He doesn't thank her for it, if this fantasy will make her happy he won't destroy it. Still he sometimes thinks he can feel his ribs touching his lungs, and he knows that the cold he feels creeping in will soon become permanent.

Scarf, teeth Tobi/Deidara:

Tobi likes to use scarves to tie Deidara's hands above his head. Then he strokes Deidara's hand-teeth 'to make sure you can't bite me' he insists. Deidara knows Tobi is lying, but Tobi's other hand is...
Deidara's hand-teeth are gentle against his fingers, just a tease of danger, something exciting. Then again putting -something- into any of Deidara's mouths is a thrilling risk. Mostly he likes to place the fingers of one hand in Deidara's hand-mouths, occupy Deidara's mouth with -something else- and stroke him slowly. Deidara is beautiful in this whimpering not quite tame state.