An observation

The thing that makes fake porn orgasms SOUND so very very fake is the Ooooh noise. No-one makes the oooooh noise in genuine pleasure. It's always aaaahhh, or ohhhhh, or mmmmmmm, or sometimes gnafagnohhbanohhuhuhyeahohfuck, and the length and repetetiveness may vary, but always the non-verbal noises are based on ah, or oh, never oo. So when the girls on the computer/tv screen are flailing round and purse thier lips and issue an ooooohh, it just sounds very wrong and very fake.

This information can be filed under "Ways to spot a faker", or "Tam has been watching too much porn".