>Second lucid dream around 11 a.m. Feeling of being in a very realistic daydream.
>The body hardly makes itself noticeable, nevertheless it pulls my spirit again and again back into the body/head.
>I hear street noises etc.
That's probably hypnogogic noises.
>My liver (?) makes itself noticeable.
>I slip into the shape of a cat and caress myself, sleep on my stomach.
>I take the liver and warm it up by a fire (actual relaxation, feeling of happiness).
>As a cat I roam the apartment, walk through the door, take the elevator, make jumps of over a hundred meters, finally jump back into my head.
Cats are symbols of fertility and femininity. The liver is an organ of purification and removing toxins- fire has purification qualities as well, so my guess, you are purifying yourself of bad things in some way.
>I start to meditate and open my 7 chakras. The energy of the astral body floating in the air connects with mine and 7 colours shine.
>Purifying, calming feeling in my own and the astral body.
>Total darkness and I create stars and moon, grass floor and I find myself in an idyllic binge with campfires and shadowy figures that remind me of gods and saints.
Given you've been doing kundalini meditation, my guess is that what you are doing in your lucid dream is not just symbolic of your progress but also something you did to yourself in the dream.
>God meets me on a throne.
>He wears a glowing crown, instead of a face I see the sunrise as if over Altdorf's painting of the battle of Issus as an explosion of colour (you actually see sun and moon).
>God asks me whether I want knowledge or satisfaction.
>I hesitate, but I choose knowledge.
To be honest, my immediate thought after I read that is "why the hell did you not say 'both'?". To continue on, meeting God (with a Capital G), seems to me to be an affirmation of connecting with divinity.
>He shows me Jesus, Krsna, Mohammed and some other figures who are rising within me.
>My consciousness goes back into my head and I wade through the two hemispheres of my brain in a very deep spiritual silence.
Various messiah figures of prominent religions. These men were very knowledgeable about things, but most the most notable thing is the deep silence in your brain. Gnosis is a strong tool, the word itself (I think) means "I know". And personally, I've found that you learn things the most when you stop thinking about something and just look at it, as it is.
>I receive satisfaction in the form of a complete distortion of reality during the immaginary intercourse with my girlfriend, she and I double and triple ourselves, my penis pierces her body, her and my anatomy merge.
>I feel sexual satisfaction. I masturbate and have an orgasm in less than a minute.
Classic dream dictionary interpretations of sex usually associate sexuality with a need to "Unite" with the personality aspects of the figure you're having sex with. I'm not quite sure if that's relevant with this, but I wonder if you need to look more for the simpler things in life. I'm not sure, just spitballing.
>I am drawn back to the dream world.
>I fly and see shapes.
>I have the impression that the first impression shows with things beyond my mind for a moment, but then my mind starts to fill it up with familiar things.
>I am riding on a boat and see my parents' house, above which a temple-like structure rises.
>Mentally I jump to the temple and see the next one on the hill above, on a nearby small mountain and then a higher one, both of which I know.
>The fifth temple is a high archetypal snow-covered mountain with a black temple on top.
>The sixth and seventh mountains are even more impressive, but the last one has no temple on the top. When I enter it, I am enveloped by a purple ray of consciousness that shoots mightily and powerfully into infinity.
>My heart beats faster. The beam feels impressively real. I try to take a step back to the 6th summit, but the heartbeat has taken me out of concentration and I return.
Seven mountains with temples on all except for the last one. I think this is relevant to your kundalini meditations- you're probably either have some emotional or spiritual blockage in the 6th chakra that is making it hard to progress to the 7th.
I hope this helped!