Thanks for drawing attention to these. For me, the problem I have with including these films in this thread is that most of the ones I have seen (including Tumbledown, Bulldog in the White House, Frisk, Bad Boy Street and The Boy with the Sun in his Eyes) do not have scenes where it's clear that unsimulated sex is occurring.
Sure some of the cast may have said it is and there is some nudity but if it doesn't look like they are e.g. handjob, blowjob, full sex including penetration then for me it doesn't really qualify and in most of these you don't actually see anything other than softcore-level.
The 'cumwhore' one you mention (title - Bottom) does have graphic unsimulated sex and so I've attached below.