Means, I have a budget, and if an expensive punt comes along, I will go for it, and wait until the budget level is replenished, before the next punt.
Opportunity I create.
Motivation, is different for everyone, I like a punt to be most of my day, if it's an incall, it's a bar, then the punt and back to the bar to relax and reflect. If it's an outcall, I have a beer, and when she arrives, I pour myself another, and offer the girl a drink, which most accept, and the meet seems to flow better, more relaxed, and the time usually extends, this is not the purpose, but is usually the outcome.