How to Strengthen Your Relationship/Cheating?
After 15 years of living together, one night during sex, my girlfriend said, "Your penis is small".
How does she know it is small? Was she able to compare my erect penis with another erect penis mentally.
She was a virgin when we first had sex 15 years ago. At that time, she commented that my penis was large.
When I asked her whether she had cheated on me, she looked down and said, "No"
What do you think?
Whether she's cheated or not, that's a horrible thing to say to a man. These days, there are many images of male and female private anatomy, both available and accessible, so she wouldn't have necessarily cheated physically to make a comparison. Again, though, that's just something that is best left unsaid to a partner, especially during the act.
I can't judge whether or not she's been with another man, but she has obviously become aware of more information, or trying to offend you . . . Sometimes girlfriends "talk," and sometimes people look at photos. Men are not the only ones who seek graphic sexual imagery. Unless she is trying to get you to break up with her, I can't imagine a woman saying something like that if she is cheating. Usually when someone is cheating, they attempt to be more discreet and less verbal, so as not to accidentally let something slip.
The head down with the answer, "No" is really not enough of an answer. If you want to get to the heart of this matter, then I suggest a question that cannot be answered with just a "yes" or "no." Perhaps you should ask her why she said what she did at the time she did. Make sure you want to know the answer, though.
I'm sorry for what you are going through.