@MisterXiado Maybe xenomorph's nose is connected to their mouth more directly, and it wasn't saliva drips, it was a nosebleed after the dude suggested she could visit his room. It's manga, after all.
@MisterXiado This saliva is not acidic, though some Xenomorphs do have the ability to spit acid, which may come from their stomachs, a special gland somewhere in their throats, or acid pouches lining the head. This can be used to blind victims, much like a spitting cobra.
@kenx Y'all think this is a thing that Japan started when it was inked in cum by a gaggle of clowns on some /tg/ SS13 server
https://tgstation13.org/wiki/The_Lusty_Xenomorph_Maid
https://soundgasm.net/u/sluttygollum/alien-fuck-story