Only some teens, and only some states. Almost nowhere considers 13 legal, but that's a teenager. And even if they do, 18 is the minimum in pornography. And that's part of the point.
Yes and no.
What's "normal" adult sexuality is almost indistinguishable from ephebophilia. Ephebophiles like young, but sexually developed, people. The reasons categories like "teens" and "barely legal" and "schoolgirl" exist and are so ridiculously popular is because regular sexual preferences are young, healthy individuals to reproduce with.
There's nothing to distinguish, biologically, a sexually developed 13-year old from a fully adult body. There's quite a bit to distinguish them legally, and if you look up 13-year old porn on purpose, you're classified as a paedophile (which it could be, but paedophiles prefer pre-pubescent, hebephiles prefer pubescent and ephebophile prefer post-pubescent). Some would argue that legal porn with categories like "teens" and "barely legal" and "schoolgirl" (and the overwhelming domination of absolutely hairless models) panders to those who would look up 13-year old porn if it were legal to do so, but don't because it isn't. Moving back to the more mental feminists, some would argue that those who search for porn featuring the youngest-looking and closest to the legal minimum age limit are doing so because they are paedophiles and these categories should be illegal... Australia literally banned all sexualised depictions of women with smaller than B-cup breasts on this basis. Yes, in Australia if you're a 35-year old woman with small breasts, the government doesn't think you can be sexy...
And that brings us back to "how are you going to track down and ensure proper treatment of non-acting paedophiles if they do not act?". Agree with the lunatics and lock up people who search for "teens" porn and have sexual partners with non-approved breasts?
The Deep South, not known for its racial equality, loves a good bit of ebony by the looks. Of course that might be consist with historic desires...
Rhode Island and MILFs though...
This still really needs to be in a thread appropriate to it though, rather than this particular thread.