A Secret Pastime in Solitude

I've been married for five years now and everything seemed perfect, until I started sneaking into chat rooms late at night to watch explicit videos of men. It's just a phase, but it feels wrong and I'm scared my wife will find out. Lately, I catch myself feeling guilty when we make love, wondering if something is missing. Am I the only one who deals with this kind of desire in secret? Do you ever feel like your reality isn't enough and seek something else to fill that void?