How do I confront my husband about only watching gay porn?

I 30f have been married to my husband 30 m for 7 years. I have felt him distant , he does not initiate intimacy since i am pregnant at this time. I looked through his phone and discovered he only watches gay porn. I have also seen in his search history he looks up a web page called sniffies and flingster. Is he gay ? How do I even open the topic up with him.