These questions have always puzzled me:
1. Why do guys fantasize about lesbians. if they're lesbians, that means they don't want you
2. Why do guys like to cum on a girl's face or boobs?
1. What is hotter than a person who doesn't want you? Is it really so cool to say "I want" and instantly receive it? It's a forbidden fruit and 200% of womanhood (let's be honest, they more fantasize about two beautiful girls rather than some dunnowhats you often can meet in a gay bar). Besides, analysing this fantasy I see some needs of finding out about women's souls, their secrets. And obviously - a number of women is bisexual, like Nikki and I for example
2. Humiliation factor, especially on the facial regard. He stands above you, you obediently look in his eyes, he feels the power and does the job. As for boobs, as unsexy as it sounds, they recall the maternity and in the subconsciousness it's a turn on for a very significant number of men.
Guys have many interests like that. Sometimes you shouldn't try to understand them, but guess and match the expectations; this would make you a successful lover