Do Most Guys Do This ?

The are different concepts to this. Everyone will find someone very attractive and think something sexual. Now the thought is there, but there is no desire. Women are guilty of it to. It all goes away when your in bed with your loved one, that's when that silly little thought vanishes, and you are only thinking of them.

I think this is not guy things , you can talk to him and ask him about the favorite things he need to be in you and the favorite things he love in the sex and do the changes he asked and after that ask you also what you need but tell him you need from him to stop this because you do all you can to make him happy and if he feel you not enough he must tell you and you can decide..goodluck

I think a lot of guys do this but it's not a "guy thing". If a guy is truly loyal and only wants you , you should be the only thing that comes up in his mind or wants to feel sexual for. I consider it cheating.

   Men are wired differently than woman. Both sexes do this though. Loving a woman doesn't mean you cannot think about anything or anyone else. There is absolutely no way this endangers your relationship. Do you sexual fantasies with or without your partner ever? If you answered no I think your partner is already looking for an escape route. Boring sex lives make couple part. Would you follow him everywhere he goes 24/7 so he could watch you? You'd get tired of him pretty quick huh?