Yuugi had been doing it for so long that it had become an instinctive part of his life. He couldn't even remember what it was like before - and yet, he very, very rarely had moments where his brain just short-circuited and forgot about it completely. Thankfully these really were rare occasions, but that didn't make them any less of a danger.
Anzu leaned down to peck him on the lips in-between his bites of a roll he'd gotten from a friend at work that day but never had the time to eat until he got home. He happily returned it and smiled at her, a gesture which she did the same for. Her tongue slipped out and tasted her lips. "That's pretty good," she said lightly and then turned to take the grocery bags into the kitchen. She paused before she ever got there however, and turned, looking a bit perturbed. "Yuugi, does that have tree nuts in it?" she asked.
Yuugi froze at the word "nuts" and he felt his body drain to sub zero temperature. He choked and set the evil dessert piece down and waved his arms in a frantic apology. "Oh my God, I'm so sorry! I'm so stupid, I completely forgot to check! I can't believe I forgot-" But he was cut off when Anzu threw a dinky plastic cookie cutter at him.
"Oh hush," she scolded. "I know you didn't do it on purpose." Thankfully she wasn't deathly allergic to tree nuts, but she also went out of her way to not tempt fate. It was hard, because most everything had traces of them, but she managed. Barely. "And I'm the one who licked my mouth." She shot him another smile, her lips red from her rubbing at them with a damp cloth. "But your punishment is you're not allowed to kiss me for the rest of the night."
He sighed and slid down against the couch back. Good thing he enjoyed cuddling just as much as kissing.