Talk to Urologist on Sex Timing

Asking for Self, Male, 31 years old, Karachi I am 31 years old, married 22 months ago. I have a 11 months daughter as well. My problem is that I discharge very quickly during intercourse. I discharge within 1 minute or less then 1 minute whether i do countiues or by holding time during intercourse And my wife never discharges with me due to this issue. Is it normal? Why is it so? Are there any tests required for this problem? Please guide me what to do?