Semen

You undo your trousers. Anja looks curiously at you as you take out your flaccid cock. You stroke it and it starts to harden. You are acutely aware that species from all over the galaxy are watching.

"I am familiar with this method of excretion extraction. It is a favourite of many galactic species. If I recall it is also part of the mating process of these species. We are not compatible mates but I can give you some help if you like."

"Yes please." You grunt as you pleasure yourself. You watch as the front side of Anja morphs into the body of a humanoid female. She is still orange and translucent and there is the rest of her cube-shaped body behind her but extruding out from it is the full naked body of a woman. Having never seen a naked woman before, Anja's approximation is a bit off it seems to be based on similar humanoid species. Her breasts have no nipples and her hair is more tentacle-like. She has a small slit between her legs but as you move over and thrust into the slit, it is smooth and a bit sticky as you would expect a Jelly cube to be.

Moisture does begin to seep into the area you are thrusting. It begins to tingle and you panic thinking she has started to digest your cock. Your panic ends when the tingliness changes to pulsating movement. You are still clothed but body Anja has created moves to cling to the exposed areas of your skin. She lifts you up so you are now fucking down into the cube that is her body, as she extracts all the sweat from the exposed parts of yours.

"Yummmm, you're salty, can't wait for your excretion." she moans from all around you. You are not inside her but have dipped in by fucking yourself a creator on top of her.

"Ahh" you moan as you cum. Your cock spurges out into a cavity that forms. Anja lowers you to the ground.

Anja accepts the semen and it forms a little bubble inside her. You watch it shrink then disappear. "Nice to finally meet you properly. What did you say your name was human?" She asks.