In a committed and intimate relationship, open communication is essential, and each couple may have different levels of comfort and boundaries when it comes to discussing personal matters like menstruation. Some couples may feel comfortable discussing it openly, while others may prefer to keep certain aspects of their bodily functions private.
Ultimately, whether you choose to share information about your menstrual cycle with your boyfriend is a personal decision that should be based on your comfort level and the level of trust and intimacy in your relationship. If you feel comfortable sharing this information and believe it would be helpful or relevant in some way, then it's perfectly fine to discuss it with your boyfriend.
On the other hand, if you prefer to keep it private or feel that it's not necessary to share, that's also completely valid. It's essential to respect each other's boundaries and preferences in a relationship.
If your boyfriend is supportive and understanding, he will respect your decision either way. And if you ever feel that discussing your period with him becomes necessary due to any particular reason, you can have an open and honest conversation about it. Remember, healthy relationships are built on trust, understanding, and mutual respect.