Final answer:
The refractory period is a time after orgasm where men cannot maintain an erection or ejaculate, with durations varying from person to person.
Step-by-step explanation:
The refractory period is a phase immediately following orgasm during the resolution phase of the sexual response cycle. During this time, men are unable to maintain an erection or experience another ejaculate.
This period varies among individuals, ranging from minutes to hours, and tends to increase in duration with age.
The sexual response cycle, comprising the excitement, plateau, orgasm, and resolution phases, involves both psychological and physiological reactions, including increased muscle tension, blood pressure changes, and the rhythmic contractions associated with orgasm.