Well..I'm not at all surprised that you would disagree w/me..considering your facination with this subject..
To me, (and I am not some kid who knows nothing btw) I dont find it bizarre at all. In fact, I'd bet anything it became popular the minute porn became popular.
I don't think it's silly or gross..i think it's a fetish..primitive and instinctual, however I don't believe men have changed on a mass scale at all when it comes to this..
In fact I believe it's been going on for a long, long, long, time. I just think it's not as hidden behind closed doors as much as it used to be.
I'm sure that you will disagree w/me yet again...
It's great to have something to be interested in...so go for it...
My opinion is different than yours...
I do think you're over thinking it..
It's basic, animalistic, and provided it's consensual...there's absolutely nothing wrong with it.
It's sex, you know...which overthinking tends to ruin..IMO of course.
~token