Are there any studies surrounding this topic and not just polls saying what they want you/what they think they believe?

Edit: I found this, but can’t find anymore: https://reddit.com/r/BlackPillScience/comments/8r5f7d/australian_national_university_penis_size_does/

For the record, I’m what you would consider an attractive male and have a size of 4.5”. I came from a link on r/MGTOW.