So, he was looking at pictures of penises. It is possible he is gay, or bisexual. Either way, that is a huge turn-off.
I know guys tend to love pornography. There have been times my hubby asked me to check something on his tablet, only for me to see pictures of naked women. I found it offensive, and showed him how to close out that stuff, so I won't see it. If I found out he was looking at naked guys, he'd be out the door.