I don't see the point in blaming porn. People want to blame someone or some entity for nearly everything they don't like... and often the blame is misplaced.
As someone said early up in this thread, if your partner tries to force or coerce you to do a thing that you do not want to do... and especially if they actually successfully force themself on you... that partner is a horrible person and you hopefully are able to get away from that partner. No one should force anyone to do anything.
I think it is always fair to ask. Sometimes people are afraid to ask because they don't want to be judged and they hold back desires and urges and that can be a problem in a partnership too... You need to be able to express what you want and what you don't want, and if your partner can't handle that... you probably need a better partner. Partners also need to make each other comfortable with being open about these things. Ask, get a yes and try it. Don't like it? Don't have to ever do it again. Ask, get a no? Don't try it, shouldn't be a problem, do something else that you both want to do.
But it isn't porn's fault.
If Bob watches porn and thinks he wants to try something with Sally, it should be 100% ok to ask Sally in a non-threatening environment if she would like to try that. Sally should be free to say no. If Bob and Sally find they are different enough in their needs and wants, it is ok to respectfully move away from each other like adults and try to find partners whose needs and interests match their own. It is never ok to pressure or force or try and make someone thing they are bad/wrong for wanting OR not wanting a particular thing.
If Bob can't be respectful, then Bob is a jerk.. The porn didn't make Bob a jerk.
Meanwhile, I've seen and heard about sexual acts that amaze me people want to do them. I don't know how much happens where only one partner wants it while the other feels pressured or forced. I have never kissed anyone that I didn't ask. Sometimes that is frowned upon, the asking. Men are made to feel weak if they don't just "take" what they want, within reason... No one advocates rape or assault... but a lot of people seem to advocate that a man needs to constantly be escalating sexual contact or the woman loses interest.
The face-fucking thing... just on the surface doesn't sound fun to me. I've seen some porn. Guys seem to be forcing and woman sometimes gagging... or the guys are grabbing the woman's head and forcing themselves inside... Maybe some woman like that, I don't know... but even if I was with a woman who 100% said she wanted that... I couldn't oblige. It doesn't look like fun to me.
I think we have a lot of people who aren't good with boundaries, a lot of people who aren't good at maintaining/setting boundaries, and then some outright abusers.
I think in a normal consensual sexual relationship between adults you need to be able to communicate needs and desires, turnons and turnoffs, boundaries and where you're willing to experiment. I also think that if you are a person who has some strict limits on what you are willing to do with a partner, that you are 100% entitled to that. Your partner has to understand, accept, and respect you if they remain your partner.
I don't want to talk in circles... hopefully I covered all the angles I meant to in a respectful manner.
And I'm a woman, btw. Have I had guys (and gals) ask for things I'm not comfortable doing? Sure. Have those same people tried to pressure me into it? Sure. That didn't go well for them. I will be as respectful as you are. You wanna wallow like a pig in the mud, and think you are gonna coerce ... Or worse, FORCE me to do the same?? Yeah, that's NOT gonna turn out like you think it's gonna. 
