But that's really sad, if you think about it.
"Generally in the USA, it's considered suspicious."
That means generally, Americans are unaware of these father-child activities.
That means generally, Americans didn't have a good father.
Now, a lot of people would intuitively jump to "Nah my dad was ok" - but if this isn't normal behaviour for you, then you're just unaware of how bad your whole frame of reference is. That is a tough pill to swallow, though.
Aside from purely theoretical, philosophical interest (suuuure), it doesn't really matter, does it?
"Ah yes, now that you showed us the opinion of these online strangers on your phone, we will be ok angering your father - the man who famously hires ex-legionnaires for protection of his family - for a little hanky panky."