This little one really wanted some peace and quiet!
One American mum uploaded a video of her six-week-old twins - one boy, one girl - that captures the most adorable thing ever.
The two six-week-olds are locked in a gentle embrace on the cusp of sleep.
When the boy on the right begins to cry, the camera captures the kind offering of a thumb by his twin sister.
The boy accepts the thumb and is able to soothe himself.
When the thumb begins to fall out of place, he uses his left hand to make a gentle fist to place it back.
Online for a week, the video has already clocked up almost 30,000 views.
While we like to think this baby girl just likes to play mum, other Youtube users reckon there might be more to it.
"Maybe they are used to do this from the womb!," user moreychiquita wrote.
"She probably wanted him to be quiet so she could sleep, so cute," user Lucie Locket wrote.
Either way, this is the sweetest thing we've seen all morning!
Watch the heartwarming clip below.
