The act of 'tuning' ceases the moment you kiss the girl or a relationship is formed.
A 'tune mission' is going for a walk, mission or outing with the aim of meeting, tuning and hopefully scoring with hot chicks.
"Let's go for a tune mission."
"Hey Boet, that oke is skeefing your cherry"
"I check oke, I scheme I should tune him, one time!"