Much as men sometimes fake emotions, women sometimes fake orgasms. Especially when we’re just getting to know someone, men and women tell all kinds of little lies to make our partners feel comfortable. “My apartment is always this clean” and “I came nine times” are pretty harmless in the scheme of things.
You shouldn’t tell someone you love them when you just want to get in their pants, because that’s manipulative, but faking it rarely comes from a place of manipulation. Is it deceitful? Absolutely. Would relationships be better if we all orgasmed with integrity?