Penis size

Please don’t judge me. I’ve been married for 6 years to my husband and we’ve been together for 12yrs. He was the first man in my life and the only one I’ve had sex with. Sex has always been great but lately I’ve been curious about what “great” is? Am I thinking it’s great only because I have nothing to compare it with. I know I’m satisfied and I know he is too, but am I just thinking its fucking amazing because he always makes sure to let me know it’s fucking amazing? We’ve been together 12 years and have a 4 year old son together but no matter how busy and tired life gets , he always makes sure to sneak in time for us. Sex is so important to him and it is for me too but I’m just at the point where I’m questioning that part of our relationship because of my lack of... knowledge? Maybe...in the sex world . He’s had sex with other women before me and even though it wasn’t during my time it makes me feel insecure about it , still after many years because I never had those experiences so what if there’s more I don’t know about?? For instance the penis size. I know he’s not “huge” I’m pretty sure he’s normal but I don’t even know what’s considered “normal”! So that’s another thing that I’m curious about because I don’t know how to bring it up lol I know at the end of the day the size doesn’t matter because I’m satisfied , BUT I just want to know what I have damn it. How do I bring it up? I don’t want to offend him and have him mis interpret everything thinking I’m asking for a bigger dick! And I know I can’t just get a ruler and measure him like wtf. I know Idc I’m just curious but I know it’s something weird to mention and I know it’s easy to mis interpret if brought up. I don’t want him to know I’m having thoughts that involve comparing him in bed with other men I’ve never even been with but low key kinda wishes I did before I met him. Does any one get what I’m saying??? I know I’m all over the place. It’s 2AM