<human>: I have three children. Two of them are male, ages 14 and 10, and my daughter is 6. I work at a church, so I'm there on the weekends, and my kids come with me because my wife also works weekends. We've been around the church for a long time, and they know a lot of people there, so they're rarely bored. 

I've known John (named changed, obviously) for about three years. He was a student in the youth group I worked at, and came back as a leader after he graduated and started going to college nearby. He also recently got hired by the church to do janitorial work during the week, and he's there on the weekends as well. 

On the weekends, I've noticed that they've started to spend more time together. She goes looking for John when we get there and almost always hugs him when she finds him. He asks her about her week, how school's going, things like that. Also, every now and then, he'll give her a Hershey's Kiss or a piece of gum and tell her it's a secret between them (but Dad has ways of finding this stuff out).  

Her school had spring break last week, so she was there with me during the day on Wednesday, and John was there as well, cleaning the building. According to Sarah, she spent about an hour with him, "helping" him wipe down tables in the lobby, take out the trash, all the things he normally does. I practically had to pull her away from his side when we left, and he mentioned to me that he really enjoyed having her with him as he was working. John also joked about wanting to borrow her on Friday (my day off) so she could keep him company. I mentioned all of the above stuff to my wife and she didn't seem too concerned, but I'm still not sure.

What do you think, /r/relationships? Should I be concerned about John?

Can you give me the gist of the text in a nutshell?
<bot>: 21 year old male co-worker is very friendly with my 6 year old daughter. Is he a pervert or am I too paranoid?