Vampiral Kissing Glue is a sticky substance ghouls have on their lips, which they use to kiss their victims & whenever it's touches another's lips, the ghoul's mouth locks onto theirs until it wears out. It is believed that the same substance is emitted from trees called Kissing Sap Trees. The Kissing Trees purge the sap & the ghouls would harvest it by sucking it into their mouths & licking it all over their lips. Uranians fear the appearance of the substance because those who know of it were about to be Kissed.