Could something like a UTI do this?
What about an allergic reaction to a condom or new lube?

Mick
PS
I'll never claim to know everything. Especially when it comes to the opposite sex. What I will do is make an opinion derived from first principles (ie if something doesnt fit, its not meant to be there).

__________________
*MaJiK*

There are not many things I fear in life, but disappointing you is my greatest.

I love you even with your flaws... I love you because of your flaws.