I Have A Problem Of Quick Release Of Sperm At

I have a problem of quick release of sperm at the time of sex . I am 25 years old. Height 5 ft 4 inches and weight 58. I am very frustrated right now for this problem every time. At the time of sex when she touches my penis or sucks my penis, at that moment automatically my sperm is releasing. So please help me. I can t do sex also with her for this problem. Before starting sex only my sperm is releasing. now I need a very fast recovery from this problem to do a happy sex with her next time.