Hello dear
Understand your concern
Size of penis is not important for fertility as you have already two child. Do not think excessive as it cause depression and that is the reason for
premature ejaculation. Cause of premature ejaculation : psychological stress, anxiety, relationship issue, obesity, smoking, alcohol,
hypertension and diabetes. For exact diagnosis consult the
urologist and get the following tests done: blood sugar, health check up,
semen analysis, doppler USG of penile area to exclude medical causes.
Meanwhile take following advice:
Avoid stress, talk with your partner to solve the problem, kegel exercise, masturbating prior to sex, hold the urine for sometime before urination, use double condoms or condom with benzocaine gel, after
doctor advice and evaluation you can use sildenafil and paroxetine 30-40 minutes before sex, start exercise like yoga 45 minutes in morning take fruits and anti oxidant like CO Q.
Hope this may help you
Best regards
Dr. Sagar