Ejaculation is a process whereby you eject semen from your penis, and is usually the result of reaching orgasm. It usually happens after you masturbate or during your sleep (what we commonly know as “having wet dreams”). Guys usually reach ejaculation after 5 minutes of masturbation or intercourse, and this may vary depending on various reasons. You can choose to deliberately control by delaying the process. There are some men who suffer from a condition called premature ejaculation, whereby they ejaculate sooner than desired.