You can do it. This advice isn't just for the men either, women. Sometimes we have to be a bit creative too. Fantasizing goes a long way here. And yes it is okay to fantasize about someone else while you are making love.
Fantasy is nothing more than a desire to experience good feelings.
When you fantasize about someone else it doesn't necessarily mean that's who you really want. It's more like the hot button of the day. It's a short circuit in your love battery. Just use it to your advantage. And guys, really it's no reflection on you.