The secretion of male nectar.
(as found in the vital studies in Homo sapien Spermenology)
Meriel said: "He he he...I'm just gonna unzip this and..oh!"
Virgil replied: "Oh baby, just yeah. Wrap those drunken slut lips around my .... uhhhhh...."
Meriel: "Ow! You got donkey yogurt in my eye!"