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There was a tank of liquid nitrogen in the kitchen, and for the longest time, Sam had no idea why.
Until Valentine's Day.
"...it'll still taste like molecules," Cas was saying, his voice as morose as ever.
"That's why I thought of molecular gastronomy," Dean replied.
There was clinking of cutlery and a blissful moan.
"It still tastes of molecules," came Castiel's breathy sigh. "But in the best way possible."
"Strawberry lime curd, toasted yogurt and milk crumble," Dean said.
Sounds that followed couldn't have been mistaken for anything other but kissing.
"Thanks, Top Chef!" Dean mumbled while catching breath.