Expressing your needs, especially when related to health, can be delicate. Here’s a way to frame it that focuses on your health concerns and care, while also being considerate of the relationship:

"Hey, I’ve been thinking a lot about my health, and I recently read that regular intimate activity, around 21 times a month, could help lower the risk of prostate cancer. I know this might sound like a specific number, but it’s something I’d like to work towards for my well-being.

I’d love for us to share more closeness not just for this reason but also because I feel it deepens our connection. I want to be open and honest with you about my needs, but I also want to make sure you’re comfortable and that we find a balance that works for both of us.

How do you feel about this?"