Ok, I'll go with this one.
I'll virtually always sneeze when the sun gets in my eyes, it can be a bloody nuisance when driving in the winter when the sun's low in the sky.
If I feel the need to sneeze, and for some reason can't, I'll look for the sun to help it happen.
Another thing that really triggers sneezing for me is fresh newsprint, so I suppose there's a tenuous link to the "Sun" newspaper
And I don't have to do things like this to be considered a weirdo, there's a lot more worrying things about me than my sneezing exploits
Just for Pete's benefit, I don't get turned on by sneezing