Could I fulfil my sexual fantasies while in the astral realm?
I'm talking about astral projection.
Why don't you just learn to lucid dream instead? It's much less work and amounts to roughly the same thing.
Astral projection isn't real. It's Jergens for you.
The Divine Universe has it's rules regardless of what religions or spiritual path you follow. The ethereal plane is also composed of Divine energy, which means it's a place of calm Divine peace; very unlike the Hollyweird version where demons rise up and possess people. Or someone uses the ethereal for lascivious activities.
Astral projection is willed travel into the ethereal spiritual realm for a variety of purposes or intents. Primarily astral travel allows you to see the Divine Universe through spiritual eyes instead of physical vision which can be deceiving.
The ultimate benefit is gaining knowledge about yourself, why you do some of the things you do, what things you do that aren't good for you, and how you can go about changing those things so you can walk the path you desire and advance your soul toward enlightenment.