How Do You Avoid Climbing?

Alright then. It turns out my wife actually has some say over me while I’m locked up, especially when she’s teasing and denying me. She enjoys this new authority and is testing it out. After one of these sessions, I was so desperate and ready that when my wife wanted relief from me via piv, I ejaculated in just a few seconds. It felt unfair considering the two weeks I waited for a full release only to get 10 seconds of piv followed by 20 seconds of pulsing cringing orgasm which I didn’t really want yet. My wife found it funny and barely worth the effort on my part. So. How do you manage to hold back? It seems like an impossible task, but I see plenty of comments saying others have done it. Any advice would be appreciated in case this happens again.