Quick Definition: A close where the PUA ends up sharing a kiss with the target.
The KC is a major sticking point for GPUAs or AFCs who have not had much experience initiating kisses with new girls in the past. While essential, a kiss is not the end game.
One of the dangers of new PUAs is the desire to show off with kclosing at the bar and going home alone. A PUA needs to selective about where he kcloses, be gentle with his kisses, and only sexually escalate to a make out in a sex location.
There are many kclose techniques and gambits to initiate a kiss that have been developed. One of the most common is Mystery’s technique of going in for the kiss after receiving three IOIs from the target.