We’re interested in them coz we’re a male/female species. Our
body produce hormones that keep us sexually interested in the
opposite sex so that our species would continue to breed among
ourselves. Imagine a world where humans care not a bit about sex,
our species would die. Animals display sexual curiousity too but
not as intense as humans. Also, humans tend to be curious and
interested in things they rarely see. Since the genitals are always
covered, we are curious how they look like and we become interested
in them.
