Falling asleep at 1:30am after sending panic-induced email to friend.
Cost: Two hours of sleep.
***
***
Waking up at 2:30am because the cat was clawing at your feet under the blankets and reading friend's panic-induced email.
Cost: One hour of sleep.
Falling back to sleep and dreaming that late-night, email-writing friend moved back in and baked yogurt and lettuce concoctions. (See? I told you the 1950s would hate me, but I can bake a mean dessert! Haha.)
Cost: Twenty minutes of peaceful sleep and two tangled blankets.
***
Knowing that your friends are there for you day and night?
Timeless.