Okay, you asked. Please know that I am in no way trying to brag. This is intended to be information that may help some mongers who want to extend their ability to hold an erection and last longer.
I started a million years ago with a very special partner. We would go at it for hours. Her sexual appetite was great. It did not take that long to see positive results. Everyone is different so please do your research and try different techniques. The one that worked the best for me and still works well is to work yourself close to the point of orgasm. Then pause. Pull out. Relax. Work on her for some time orally or, better yet, in 69. Then reenter and repeat this process several times in different positions. Often, you can help the chica to orgasm several times before you are ready to finish. This usually results in a better session for you as the chica will often want to do her best to reciprocate in fashion. (Some are very grateful!) Obviously, this technique works better without a condom. I always bring some extra condoms because you can wind up going through several condoms before finishing.
After first getting into mongering, I was dumbfounded when a few different U.S. providers told me that most of their clients were finished within 10 to 15 minutes. They were amazed that I would last the whole hour. (I joked with one of them that I could last a whole lot longer than the whole hour but that was all I could afford. She laughed and jumped back on top of me and we went at it for a short while longer.) This ability works wonders with the "one 'n' done" nature of sexytijuana.com chicas. Their fee is anywhere from $40 to $60 per hour, very reasonable indeed. However, they charge for the hour or until you orgasm, whichever comes first. I always get my hour's worth!
The real trick is to work yourself close enough to the point of orgasm that you actually do have a small orgasm without ejaculating. After doing this several times, when you do finally ejaculate, it is inevitably yet another blissful, intense explosion that goes down in your growing list of memorable experiences that will help you look back upon your life fondly before taking your last breath. Sometimes, you can wind up with a huge case of blue balls. This is even better because these ejaculations are exquisite -- extreme pain and pleasure intermingled perfectly.
Even given the anonymous nature of the Internet, I am often reticent to share these experiences with other mongers. The manners in which they discuss their exploits and their relationships with women -- civilians or pros -- leads me to believe that, for many, their sole desire is to simply empty their loins into a suitable female receptacle. Personally, I have not done a street girl for about a year and a half. I just do not find a fifteen- to twenty-minute session that satisfying any more. Again, I am not trying to brag or anything like that. This is just my humble personal mongering experience.