"Of the three of us-" Four counting Delta, which he isn't since D has no taste for such things. "I'm the one with a history of healthy relationships. So trust me." He brushes his lips against Wash's temple, slowly unwinding until he's loose and easy. "Mind tak'n a nap with me?"

He sleeps better with a second body present- preferably one that he trusts and cares about.

Besides.

Wash didn't get any sleep the night before.