Boys do not have periods because they do not have a uterus or ovaries, which are necessary for menstruation. A period is the shedding of the uterine lining that occurs as part of the female reproductive cycle, which boys biologically cannot experience

. However, boys and men do experience hormonal changes and fluctuations, particularly in testosterone levels, which can affect mood, energy, and physical sensations. Some men describe experiencing symptoms similar to premenstrual syndrome (PMS) in women, such as irritability, mood swings, tiredness, and cravings. This phenomenon is sometimes called "irritable male syndrome" or the "male period," but it is not a true menstrual period since there is no uterine lining to shed

. In summary:

• Boys do not have periods because they lack the reproductive organs (uterus and ovaries) required for menstruation

• Boys and men do experience hormonal cycles involving testosterone fluctuations, which can cause mood and physical changes somewhat analogous to PMS in women

• This male hormonal cycle is not a menstrual period but can sometimes be informally referred to as "man-struation" or "male period"

Thus, while boys do not have periods, they can experience hormonal changes that affect their mood and body in ways that have been compared to the female menstrual cycle.