#!/usr/bin/perl
use warnings;
use strict;
use feature qw{ say };

use XML::LibXML;

my $html = ...;

my $dom = 'XML::LibXML'->load_xml(string => $html);
for my $body ($dom->findnodes('//html/body')) {
    say '-' x 40;
    say for $body->findnodes('p');
}