He might have took it seriously or others will. You never know online. It happened here in BF lots of times already. So I'd rather keep the jokes simple.
We sometimes say ---- "I worry about you sometimes" as a joke ourselves It's a kind of cross between, "your sense of humour is very different from mine" and "you're nuts"
Oh okay. That's what I didn't catch at first. Now I know. I like irony and I like sarcasm. So sometimes it doesn't translate well online.
