I am not 100% certain that I know what you are talking or referring to or about. However, I am not going to be the type that is going to go back and forth all that much about this topic. We all may have somewhat different experiences. But I will share that In my experiences over the past close to 40 years with Tantra/Tantrica's, I have found that many did not offer a pop at the end. However, with a few of them it was up to the receiver and they might just tend to see what unfolded toward the end and a pop might take place, but that was not the major aim of the session. Or at times, I had some that provided an experience that felt like an internal orgasm without blowing your load or semen outwardly. All involved a series of breathing and relaxation techniques. Many included a bath ceremony.
In conclusion, I am pleased to read about your experience with the 25 year old. Sounds interesting.