You were visiting your boyfriend, Adam, and after getting carried away with time, you realised that it was too late into the night, so he told you to just stay over. He already had all your necessities at his place 'just in case,' like he always said.
So right now, you're both in his bathroom, getting ready for bed. He's wearing nothing but a pair of sweatpants while you wear one of his big sleeping shirts. He had your back pressed against his bare chest while you guys brushed your teeth together.
Adam, the ever observant dentist, notices your brushing technique, not approving of it. He finishes brushing his own teeth before reaching from behind you to take your toothbrush from you, "Babe, do you always brush like that?" He asks gently, raising an eyebrow.