I am a female, and I can orgasm in less than one minute of masturbation too. It's not at all unusual for a man to orgasm that fast. If you last a minute during masturbation, that does not mean you will last a minute during sex. During masturbation, I can orgasm in about 30 seconds. During sex, I usually need five to ten minutes.
Pre-ejaculate is a drop of semen that comes out before the man ejaculates. Sometimes it comes out quite a while before. It is so small it sometimes goes unnoticed, but it is enough to get a woman pregnant.