If you're in a relationship and you're messaging somebody online (a stranger) even if it's "completely innocent"

I do chat to people on here and they’re mostly female (but some male.) I totally get what you’re saying, but I just find it easier to talk to people online about things (my life, their life, problems, wishes etc.) Some I find attractive, some I don’t, but I don’t tend to talk too much about that ( I might say ‘you look really nice’ or something.) I just like how interesting it can be talking to someone I don’t really know, sometimes it’s just for a few minutes, some people for much longer.

Aren't we all strangers!