What do you think counts as losing your virginity?

I'm not trying to justify anything and I do not hope to see any particular answer.
I am simply curious about what people think.

In my case, I gave and received oral sex at the age of about 8 or 9 and had orgasms (but without ejaculation). I was precocious at that age, but I didn't even know what sex was. I was just following the instinctual feelings. I sometimes wonder if that means I (kind of) lost my virginity at 8.