Maregasm fluid contains......

[Thornz2000]

I looked all over and could not find out what is in the maregasm fluid.

 

[caikgoch]

Mare "nectar" is a mix of plasma from the vaginal walls and mucus from Bartholin's glands. On orgasm you also get an analog to prostatic fluids from Skene's glands. And there may be some urine simply because of the pressure that a penis that size can put on her bladder.