Regarding Alien, I'm just posing an alternate possibility. One you seem to have a real problem with. If you have definitive proof of the intent of the filmmakers about the '**** of Lambert' please share it here. I'd be curious to see that.
Dan O'Bannon openly states in the
Alien documentary from the BD (and older DVD) that "
Alien is about inter-species ****".
Now, one could consider literal and figurative **** - or, if not **** in the human sense, then imagery pertaining to insertion, penetration, etc. Obviously,
Alien is rife with such imagery, from obvious moments such as entry into the Derelict, Kane's impregnation, etc. to more subtle but no less important visual cues like air duct openings, slow tracking through doorways into the Nostromo's inner 'womb' (the freezers), and Ash's attack upon Ripley.
Indeed, Ridley Scott openly discusses, again in the BD documentary, the question of replicant 'sexual' urges and how, lacking the necessary equipment (ahem) or, indeed, the embedded instinctual urge of
**** sapiens, these might manifest in some skewed fashion. Ash's assault upon Ripley and the truly bizarre magazine penetration is coded in such a fashion (obviously, Scott also pursued themes of replicant sexual logic in
Blade Runner).
For further reference, please read this entry over at '
Strange Shapes' blog - the very best (and most intelligent)
Alien resource on the Internet. It quotes Veronica Cartwright on the matter.
https://alienseries.wordpress.com/2012/10/22/debate-loving-lambert/
I still pretty much stand by my remarks (in the comment section of that blog article) regarding the Lambert issue: unknowable - although heavily weighted towards some form of sexual attack, given the context of the film more broadly.