Need advice on spouse-sex with other women

Please bare with me as I’m not sure what I’m looking for here. My husband is amazing, truly one of the most amazing men I know and EVERYONE that meets him will say the same and how lucky him and I both are to have each other. People always come up to us and tell us how great we are together. He truly is my best friend and I melt anytime I look at him. We’ve been together almost 8 years and have 3 children together. We have sex 5-8 times per week. I stay home and the way his job is, he’s home almost every day. We’re very fortunate to live the life we live.

Now getting to the issue...

He he has a desire to sleep with other women. He’s never cheated on me and says ‘sex is just sex’ and that he loves me. And I truly believe he fees that way. He claims that every single guy feels this way and we just have an open enough relationship to discuss it together and most guys won’t actually admit it but they all feel it. I can’t say I don’t agree with him.. something about when you first start to get intimate with someone and the initial touch can send you over the edge. I’d be lying if I said it’s not a thought every now and then. I don’t want anyone but him tho and the idea of him with someone else makes me actually sick to my stomach and ache so bad. I don’t understand if it really is normal for a guy to want to be with other women or maybe I’m just not enough for him? I explained this thought to him and he cried and held me and told me I absolutely am and he hates that he made me feel that way. But it gets brought back up one way or another eventually. I know he would never do anything to hurt me but I cringe at the idea that I’m not enough for him and that maybe we both need something else... maybe I need someone that truly only wants me(if that actually exists?) and maybe he hasn’t found that someone that he can’t get enough of and completely satisfys him?

Again, not sure what I’m trying to get out of this but really need advice. I’m too embarrassed or proud to admit to any of my friends that something might be wrong with my marriage. Maybe there isn’t tho and I’m thinking too much about it and trying to live a fairytale life. I really do love him and know he loves me-but is that always enough?