I'd say it's most definitely fine, it depends on the people, who they are as individuals, and how they both feel.

Think of it this way - if you polled people, in different cultures, throughout history up through today (even in different parts of the world today), you'd get a huge array of results. All a poll is going to tell you is where the culture stands. So the question is - does that matter? If we aren't harming anyone, why allow ourselves be shackled to arbitrary cultural views?