About lesbians who enjoy watching gay porn?

I have heard that many lesbians enjoy watching gay porn. I am curious and would like to ask a few questions, and I hope that lesbians who enjoy watching gay porn can answer my questions.

Many lesbians hate straight/lesbian porn because they think these porn are fake and woman are subjugated. And they love gay porn because they think the actors truly enjoy sex.

But why do lesbians perceive that gay porn actors truly enjoy the process of sex while actresses of straight/lesbian porn are faking the pleasure? And it is to me quite weird that lesbians who dislike penises and the male body will enjoy watching two men having sex.

No offense, and please be honest about this. Is there a factor of "penis envy" inside this? Do lesbians gain emotional satisfaction when they see that male possessing penises and traditionally play a dominant role, can actually be dominated and subjugated by another person?