i tried to follow a thread here but wasn’t allowed to by the site.
sometimes when i think about sex, i sneeze. it’s not every time i think about sex. and often, i think about sex, and don’t sneeze.
but sometimes, the dirty/lovely sex thoughts make me sneeze.
r.
LINK TO COLUMN: Why do I sneeze after every orgasm? - The Straight Dope
If you have sex and sneeze at the same time your eyeballs will fall out…
No shit! 
On the bright side, it’s better to sneeze than having a hiccup. That tends to defuse the moment into sheer laughter.
Welcome to the Straight Dope Message Boards, rohanso, we’re glad to have you here. When you start a thread, it’s helpful to other readers to provide a link to the column in question: helps keep us all on the same page, and saves searching time. I’ve added a link at the bottom of your post to the column that I assume you’re referencing. (If I’ve got it wrong, please send me an email or PM to let me know and I’ll be happy to fix.)
No biggie, you’ll know for next time. And, as I say, welcome.
I once sneezed during sex with my wife and a giant booger went right in her mouth. She was none too pleased.
Aren’t anonymous user names a pleasure at times like this? 
It’s always useful to have an anonymous username with your wife.