I don't fake it. I did a few times, when I started having trouble with orgasm a few years ago, and I "felt bad" that my husband was working so hard for no return. Then I realized I was promoting actions that were not working for me, and I was being dishonest. I immediately stopped. I had only done it once or twice, but it was enough for me to realize it was damaging to our relationship.
We always try to get me to come. (Unless it's a morning quickie after an evening marathon in which I have orgasmed, then I don't have to get off the next morning.) On the occasion that I don't, we're both disappointed, but we both believe being honest with each other is more important.
My Man is a grown man. He can take it if his efforts didn't work. He works his ass off to make me happy sexually, but is mature enough to understand that "that happens sometimes" if I don't.
As men get older, they don't come every time anymore
It took me a while to get used to his saying, after a 2 hour marathon (with plenty for me) and his not coming yet, "Babe, I'm tired. Why don't we continue this in the morning." Then he's fresh and has no problem. It doesn't "hurt my femininity" if he doesn't come, so why would I fake it for him?