If I'm understanding you, he isn't having trouble getting it up or staying up he just has a problem with early ejaculation. He may want to try exercise. There are specific muscles that control ejaculation. Let him know that these muscles are the same muscles used when guys stop their stream of urine. Identify the muscles and work them out by contracting them for 10 seconds releasing. He needs to do 200 to 300 reps a day to build those muscles. If it isn't physical it's mental. I think this one is physical. One last piece of advice, work on creativity in the bedroom and do everything you can to build up his self esteem.