If he is looking for enlargement; “enhancement products” do not work. If he is looking for sustaining power, ehancement products are not the right tool to increase sustaining power. Consider it like using a hammer to screw a lightbulb; not the right tool.
There are pills to sustain an erection but I wouldn’t advise it because it does not take care of the actual problem.
Sometimes it is a mental block. Oddly, the fact that he is bummed about it sends it into a vicious cycle where his “bummed” creates more of a problem which makes him even more bummed which creates more problems.
Many men have similar problems and sometimes talking about it helps relieve the problem.
Sometimes it is him being tooo excited that he may finish early. Tell him to relax. Do not tell him it is “no big deal.” To him it is a big deal. Don’t over think the issue.
If it happens move onto some other type of foreplay that gets him stimulated in other ways…or more likely have him do foreplay activities on you that gets you stimulated. This will boost his ego that he can still give you big “O’s” without his tool.

I disagree with these posters. Although many people are understandably skeptical, many of the new male enhancement products do work quite well. Most contain many of the natural derivatives found in Viagra, Levitra, Cialis, etc., but are completely natural and have no side effects (or drug interactions) as their pharmaceutical counter-parts do.
Think about it - where do think the main ingredients in these drugs comes from? They are usually based in plants, herbs, and other natural medicines used for centuries in other cultures. Herbal supplements have many of the same ingredients in a non-pharmaceutical form.
Although many factors may play into your boyfriends ‘problem’ including psychological or physical components - there’s a good chance that he will benefit from taking a natural male enhancement supplement. You do have to be careful as there are many cheap products out there. Products like VigRX and Prosolution pills have been around for several years and are formulated and approved by doctors.
Check out http://www.vigrxplus.me.uk/ to learn about VigRX Plus, a new and highly successful option for men looking for natural enhancement. I hope this helps - do as much research as you can and you’ll learn a lot more than you will from many of these posters who profess to know the answers when really they are basing their answers on their personal opinions - not facts. Good luck!