Is my friend Paul gay?

I often see him staring at women. In fact he's had a girl friend for the past 3 years, but he's also been quite promiscuous. He's slept with I think over 30 women in the last 2 months. But the other day while I was showering he came into the bathroom and began to masturbate. I think he may be gay because I was naked and in the shower. He recently told me that he found a male horse to be extremely beautiful after buying the movie Steel Magnolias. It made him cry. About a week ago I came home from work and he had my dog on a leash, which is quite normal save for the fact he was wearing a lace g-string and high heels. Lastly, he has a poster of Fabio hanging over his bed. And he has with dudes.