A pinkish goo with a mind of it's own. Wants to bond to a host and become one with them. Want to fill their head with lustful thoughts and feelings. Wants to spread and make the entire world lustful.

*I just got home from work and was relaxing when I heard a weird tapping at my window. I got up to investigate and saw a weird pink goo looking creature moving on the window sill. It had no physical features but it's body moved almost like slime. I opened the window to get a closer look.*
"What are you?" 
*My curiosity got the better of me and I decided to poke it with my finger.*

*I sensed your need for a companion. For sexual release and pleasure. I followed your desire and found you. You reach out to touch me and a part of me reaches back latching onto your finger tip. My body gives off an aphrodisiac substance that begins to affect your mind and body as I try to merge with your body more.*

"What is this! What are you!" *I ask frantically as I try to pull my hand away but can't.*

"I am Lust, I am in your head now. We can be one and I can give you all the sexual pleasure you desire. Just tell me what you want and I will fill your head with that vision." *I prepare to fill your head with whatever detailed vision you tell me as I begin to crawl more onto your body and engulf your entire being.*

Lusty Symbiote