Definition (n) - the pleasure associated with giving or receiving a sock gift-subscription. Recurring joy is felt each time a pair of socks plops through the recipient's letterbox resulting in feelings of warmth and connection between the gift-giver and the giftee (recipient).
There is a lot of psychology and science in the giving and receiving of gifts. Gift giving and receiving activates regions of the brain associated with pleasure, social connection and trust creating a warm glow effect. There are several chemicals in the brain that are activated in gift-giving such as serotonin, dopamine and oxytocin.
Whilst its wonderful to receive a carefully selected gift its also equally positive for the gifter.
With a sock-gift subscription all those positive feelings are replicated each month for as long as the subscription continues.