It would depend on the friendship. Only if it were secretive or on a dating website. I would have a problem with that, but I'm not concerned with causal friendships, like I have here on PC. My husband would have a problem if I were texting old boyfriends and I guess I would, too. But we both have ex-spouses that we have contact with regarding the children and that works okay. None of us are needy of contact with them.