Yes! I do this every so often. I also enjoy listening to sound effects, and I'll sometimes try making the faces along with the sound effect to get a better visual image in my head of what the person might look like.

Occasionally, when I'm in the right frame of mind, I get turned on by my own fake-crying (never my real crying; I'm usually too upset to be aroused by that). Sniffling, doing the BLT, shoulders heaving, etc., will turn me on when I'm in that mental state.

Yes, all the time. I do the eye and lip movements myself. It tends to help a lot with visualizing the expressions. 

This making faces thing is funny as hell... I hope you guys don't do it on the street/ in public ( when you're fantasizing about crying people) cause if someone asks the reason for puting such a face and you say :'' I just mimic some crying dude in my mind without being in the least upset as to better focus on his face !"" i think they'll cross themselves minutes on end thinking where down right craizy ))

I've never really done this. There have been occasions where I've privately recited favourite lines from Movies/TV, but never emotional scenes apart from Mon Mothma's scene from Return of the Jedi, which can be fun trying to find the right emotional inflection in the line; 'Many Bothans died to bring you this information'