Is it normal to want to have sex with my wife's ex boyfriend?

Before you say NO or WTF! He was my best friend since 6th grade & we did everything together except 'experiment' (even know I wanted too but never told him). He dated my wife way before we got together. I was introduced to her by him when they where dating. They didn't last long. Eventually (over a year later) I asked him if I could date her. Yes! So me & her hit it off & are now married & have been together 5 years. We lost our friendship over her.
I'm even more curious about his dick knowing he had sex with my wife before I even met her. She says it wasn't good & she never came. But I always wanted his dick & now I want to test it out even more just to see what he gave my wife & fulfill that bi curiosity I have for him. I've even told my wife & she knows I have a bisexual past.

Is it normal? Feedback please