A partner demanding spitting, deep throat until gagging, or unlubricated anal sex may be watching too much porn. These acts mirror common porn scenes and often aren't pleasurable for women, suggesting his expectations come from the material rather than mutual desire.
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If your partner, male partner, wants to spit in your mouth, if he wants to stick his cock down your throat until you gag, if he's having difficulty achieving an orgasm, if he's going into the butt without using any lubrication, then chances are that he's watching too much porn. One of the things that struck me about that Russell Brand documentary and what some of those victims were saying was that clearly they were with a guy who was a self-acknowledged porn addict, because porn addicts are clearly identifiable by asking you to do things that really you only see in porn films. Most women don't find any of those things pleasurable, but of course when you're watching a porn movie they may look great.