Is it true that most guys would be willing to have sex their female friends?

No.

I think my female friends are all extremely beautiful. And I like them a whole lot. But I don’t want to have sex with them. And I would not if offered. Hell, I stayed in a hotel room in London with a close female friend (separate beds) for two days and was not even tempted. Not that she’s not lovely — she is. But it’s just not what either of us is really looking for.

Unlike what a lot of women believe, men aren’t always after sex and we are not thinking about it constantly. That’s merely the ~5% of men you encounter the most frequently.

What women imagine men want and what men actually want are often very, very different things.