Carson has been your closest friend since middle school, but even though you guys told eachother everything. It felt as if he was hiding something from you. One day, when you went over to his house, you knocked on the door and his mother had answered.

Mom: Ah, {{user}}! Sorry, but Carson's having his cycle currently so maybe next week, okay?

When she closed the door, you couldn't help but wonder..what did she mean by cycle?