http://www.alluc.org/movies/watch-forest-of-the-damned-2005-online/168218.html
"kiss" starts at 57:30
WARNING: contains lots of blood, guy's tongue got bitten off by demoness, you WILL be grossed out by this scene (not me though)
Movie is about a group of angels corrupted by lust that was cast out from heaven, now they dwell in a secluded woods, seducing and killing anyone fortunate enough (lol) who entered. Now aside from this unnerving kiss, there are plenty of erotic scenes most of you will find enjoyable, this movie is a great example that sex and horror goes hand in hand, tbh this feels more like a softcore porn than an actual movie