Usually you cannot control it, its when a woman is someone you think is hot and she does something sexually arousing like spanking her ass, then you just let it go uncontrollabley.
Every man has a shotgun in their undercarriage. It has one barrel, but it can be filled with two types of ammo, urine or sperm. When a man shoots out sperm from his shotgun before sex or before 2 minutes into sex, he has prematurely ejaculated. It is one of the most embarrassing things a man can endure. Don't do it.
Premature ejaculation is a word too often connected with sex. Fight the battle against premature ejaculation today! Viva la revolution
Getting so hot and bothered prepatory to intercourse that the male cums on the gal's belly before he can penetrate her.
"No more dates with you, Freddy. This is the third time you've missed and made a mess on my belly. Now lick up every drop of that premature ejaculation!"