Pillows
The day had been long and wet, and Bilbo felt rather sniffly and sore; so when he went to take his bath, Thorin in secret took every pillow in Bag End and piled them onto the bed for him to cuddle.
Bilbo smiled when he saw them; then he fell back onto the bed, vanishing into the pile with a sigh. But his hand appeared a moment later, beckoning Thorin over; then he twined his arms around the Dwarf's neck, pulling him down, as well.
Because, while pillows are nice and soft, they couldn't cuddle Bilbo back like Thorin could.