It sounds like you're referring to guidelines or societal norms regarding dating and relationships during different stages of life. In many cultures, there are often social conventions about when it's appropriate to start dating, which can vary by factors such as age, maturity, and cultural or familial expectations.
Typically, younger individuals may be encouraged to focus on education and personal development before entering serious relationships. As people transition into young adulthood, they might have more freedom to explore romantic relationships and partnerships.
Remember, while there can be societal norms, personal values and individual circumstances play a crucial role in determining when and how one chooses to engage in dating and relationships. Ultimately, it's important to make choices that are right for you and respectful to others involved.