When a man has sex for the first time in his life the average man lasts around 6 to 10 minutes in bed.
Then after awhile of more sex some men can last as long as 53 minutes in bed.
The average man also ejaculates into the woman's vagina within 15 seconds to a minute of having sex with her.
For some men it might take longer for the sperm to come out than for other men but usually within less than a minute the man is able to ejaculate sperm into the Vagina once they start sex.