<human>: Give me a shortened version of the text

This is my throwaway account.

I've been active on reddit for about a month. I have an employee (hired less than six months ago) who is also on reddit -- he's told me he is. I was in a sub that I follow and found a question he posted about a project we're working on. I wasn't 100% sure it was him, but I checked out his other posts and found some that made it absolutely clear it was.

I have no problem with him asking reddit for help, BTW; I ask internet forums all the time when I don't know how to do something. I also have no problem with him using reddit, even if he does it at work, because he also gets a ton of work done for our company.

On my real account, though, my post history tells a lot of things about me that maybe my coworkers and employees shouldn't know -- relationships, polyamory, advice, parenting, sex stuff, etc.

I trust this employee's discretion -- if I didn't, I wouldn't have hired him -- and I think it's cool that both of us are on here and participating in the community. 

So: do I tell him "hey, I saw your post on ~x sub~ on reddit, it was pretty cool, let us discuss further", and then he may find my real username and find out this other information about me -- which, as I said, he probably won't care about given what we've discussed at the office already -- or do I keep my mouth shut and we both pretend we've never seen each other on reddit?

(For all I know, he knows my username already. I'm not super secretive because my real name isn't on the site anywhere, nor is it any part of my real username.)
<bot>: Do I tell my employee, who knows I use reddit and he knows that I use reddit, that I found his username? Or will this reveal too much personal info about me?