The boy helps his father to warm the newborn twin brothers

Some images that eventually go viral are so heartwarming that almost nobody can't resist the urge of sharing them with the world, and this one is no different.

One of these uncontrollable viral pictures shows a little boy helping his father warm his two premature twin sisters at a medical center

According to Newsner, the picture was originally published on Danish Facebook page Parents and birth in Denmark some years ago.

In the picture, the boy can be seen using a technique called Kangaroo care, used to warm newborns without using an incubator.

The picture went viral on different occasions, due to it being shared over and over throughout the years since it first was posted.

This Kangaroo care technique consists of holding premature babies skin-to-skin to warm these little newborns, and this child was willing to help.

The National Institute of Health conducted several studies in a big research that showed that this technique is effective in reducing pain among preterm babies.

Premature babies are extremely sensitive to pain because their brain and nervous system aren’t yet fully developed and this technique seems to help.

The National Institute of Health revealed that skin-on-skin contact seems to have an analgesic or sedative effect, which reduces their pain responses.

Swedish Professor Uwe Ewald described how kangaroo care works in a response he wrote when he encountered the picture on another website.

'Skin to skin contact helps the baby to breathe better. The child becomes calmer and gains weight faster. Research shows that parents bacterial flora, compared with hospital bacteria, reduces the risk of serious infections in these delicate children,' he wrote.