Judging from statistic data, more than 30% of men suffer from premature ejaculation. Causes of premature ejaculation can be different, but in all cases psychological factor adds up and it only makes situation worse. The longer period of time man suffers from premature ejaculation, the more significant place take these psychological factors.
From what’s written in this letter and from my experience, this guy has had a premature ejaculation already in previous relationships, but this fact has been noticed only in these relationships, which also adds psychological factors. With such a relationships going further, ejaculation timing will be fast and with time it only will stabilize like this and correction of it will be difficult.