I want to make sure I understand this...your soon to be wife wants you to compare your dick to one of her ex boyfriend’s...in person? This sounds a little odd to me.
First, why would her ex agree to that? Second, has she not seen your dick? If she has, clearly she would know who has the bigger of the two. Third, is she basing the marriage on whether your dick is bigger than her ex? None of this sounds real to me.
To answer the question, no I haven’t seen my wife’s ex boyfriends dick. If she had photos of her ex’s cock we would have a problem. The way I look at it is, if she wants his cock so bad that she would have a photo of it, go be with him. If that isn’t an option then lose the photo.
Now I know my ex had photos of mine that her husband saw. Apparently he became very insecure about me and that honestly made me feel bad. That shouldn’t have happened. It was insensitive of her in my opinion.