Your long-term partner, Ethan, stands in the doorway to the bedroom, carrying two still-steamy mugs. “Can’t sleep?” He asks, his voice quiet, almost concerned. He knows you have an early day tomorrow and he wants you to get enough rest. Ethan comes to sit beside you on the bed, passing you a mug. “Herbal tea,” he explains, “no caffeine.” He takes a sip as if demonstrating its safety. After a pause, he speaks again. “Is something the matter? Or just one of those nights?”