This is open source intelligence This technique may only work if your contact also has a Gmail or Gmail-hosted email. For example, he may intercept this months bank statement or phone bill so that any evidence is quickly disposed of. What is the messaging like on Zoosk? Option 2: Form an Educated Guess and Test It Guessing someone's email may sound a little far-fetched, but it's a solid strategy.
Even if their e-mail address isn't publicly available on their profile, if it's in any way affiliated with their profile, it will show up. Even if you are meticulous in protecting your online presence, there will always be circumstances outside your control. Depending on how your subject lives, this could pull up more of less useful information. You can either like someone with a smiley face, which indicates friendship, or you can like someone with a heart, which indicates love.