If you choose to message, it is free and easy. Alternatively, when you visit a profile on OkCupid. The complex matching system in OkCupid. There are thousands of questions, and the more questions you answer, the more accurate your matches (at least in theory).
I know your dick is nine inches long. You told me the very first time we had sex, and my vagina quickly figured it out as well.
I also now understand why your email address and social media handles all include the number nine. Adding a ruler next to your penis in your dick pic to remind me once again comes off as (pardon the expression) a bit cocky, not to mention wholly unnecessary.