I'm an only child.  No siblings.  Just me, myself, and I!
Did you enjoy being an only child, or do you wish you had siblings?
Even though the term generally applies to those who've never had siblings, I actually have.
Which term are you referring to?  I am confused.  Do you have siblings or not?
Well throughout history, only children were relatively uncommon.  I thought it'd be interesting to be one of those.