Hi @Ant7, it sounds like you and your wife are very romantic with all the kissing, hugging and hand-holding you do! It sounds ideal.
Yes, I believe it is common for men to think about sex all the time, as far as I know. I think it might have something to do with men having more testosterone than women. I mean, biologically, men and women are designed a bit differently.
Although, there are certainly women out there who are very focused on sex! I have met a few.
You might like to talk over these kind of things when you see your psychologist, @Ant7. They would have a lot more relevant information for you.
I believe I taked about sex a few times with the psychologists I saw. They were very open and understanding about sexual issues..... I'm sure a lot of clients go to psychologists and talk about sex. It would be a pretty common thing.
You might especially like to hear the views of other men. Unfortunately, I don't think there are heaps of men on this site, at the moment..... anyone out there??? 
I could tag a few people but I'm not sure they would appreciate it!