All a "Period" is, is a chemical imbalance.
Men do indeed have such, even though it's not of the menstral sort.
If my memory and vision serves me correct.And men do indeed undergo "periods" (cycles) of chemical imbalances; those balances are not as scheduled as women's are (not necessarily related to our reproductive systems), but they do exist.
Speaking of menstruation, all that cycle is, is a chemical imbalance, as I previously stated.
All a "Period" is, is a chemical imbalance.