Guys, Was I being mean?

A guy online, age;50 (plus) dmed me at a online dating site, I named myself Poison because why not, so the guy was like Hi baby let me taste some of your poison to which I replied you don't need any you're 50 (plus) now it won't be long till it's your time to taste death. He got mad, cussed me out then blocked me!. What's wrong with what I said though because we are all mortal soon, we are all will taste death, also I did answer his question yeah, yes it's a bit of dark humor as well may be he didn't get it, anyways though was I wrong?
mean?
mean?
Guys, Was I being mean?
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