Sleep together
Definition 1 of 2
Pro Tip 1/3Cultural Interpretation
In some cultures, sharing a bed is a sign of friendship or family bonds, not intimacy. 
In our dorm, we often sleep together to save space.
Pro Tip 2/3Literal Meaning
Understand 'sleep together' literally means just sleeping, not anything else. 
When their house was being painted, the kids had to sleep together in the living room.
Pro Tip 3/3Non-romantic Context
Use this phrase for non-romantic sleeping arrangements, like with family or children. 
The baby twins sleep together in one crib.