<human>: I used to have a lot of guy friends, more than females, while I was younger/single. But that has changed over the years and while I'm now in a committed relationship, i really don't talk to guys anymore. In the workplace, sure but not as outside friends really. None that aren't "our" friends. My SO says he wouldn't care even if I did have guy friends I talked to regularly.
So he has a female friend. i've met her and like her. We get along and have a few things in common.
She got divorced a while back and says she is in this "having a good time" phase. She doesn't want to get tied down. Understandable.
So I noticed they text and send messages on facebook more often than they did while she was married. (He was friends with both of them but I have to be honest, her ex is kinda crazy). He's shown me some of the messages, it appears there isn't ever "sexy talk" or anything. There sometimes is joking or cutsies though. But maybe i'm just thinking they are because it's stuff like, "hey there sir" or "hi chick" which I find cute.
While I don't know that it's justified, i've expressed uneasiness and asked both of them straight out if there were feelings. Both said no.
So here I am asking you, Reddit. Is this normal? Is it normal to have friends of the opposite sex while with an SO? Does this acutally sound odd or am i just being paranoid? If so, how do I stop it?

Can you provide a brief overview of the text?
<bot>: SO has a female friend and they talk a few times a week. I'm uneasy but I'm not sure i have any reason to be? Both say there's nothing there when I asked.