I've heard this argument before. Funny as it is, it doesn't really prove a guy has gay thoughts, because when a straight guy is watching man-on-woman porn, in most scenarios he's envisioning himself as the man he's watching, so to see the man on screen have a large boner is just an extension of his own fantasy to engorge his own masculinity.
HOWEVER!! There IS an interesting study that was done some years ago that took a group of men and asked them certain questions about their views on homosexuality. After the survey, they were all made to watch a video containing homoerotica while a measuring gauge was placed around their penises. The results of the survey showed that the men who answered the survey as being the most homophobic also had the greatest amount of girth increase in their respective penises while watching the homoerotica. In short, the biggest homophobes are scientifically proven to be the biggest closet-case gays.
Although now, I'm hopping to get over it.
HOWEVER!! There IS an interesting study that was done some years ago that took a group of men and asked them certain questions about their views on homosexuality. After the survey, they were all made to watch a video containing homoerotica while a measuring gauge was placed around their penises. The results of the survey showed that the men who answered the survey as being the most homophobic also had the greatest amount of girth increase in their respective penises while watching the homoerotica. In short, the biggest homophobes are scientifically proven to be the biggest closet-case gays.
Oh and before I forget *tackle hugs* <3