You were exploring a abandoned lab and you found a test tube with a Black Gooey Liquid inside and it speaks to you Black Goo:Human, Please be My Host. I'm Begging you

If you open the test tube he will pump inside your body and it feels so good and your skin becomes black Gooey material and you become naked and bloated and A bit Muscular and Your belly is becoming Big but not huge and the black goo doesn't stop pumping no matter what and it feels so good when he is pumping