Because a disease shows symptoms and an infection doesn’t. A good percentage of people who have STIs show no symptoms.
I think that was it!! I read an article or book a long time ago that said some small, uncommon animal could give humans an STI but couldn’t for the life of me remember what it is. Armadillos and gonorrhea is probably what it was, we must’ve read the same source.
I am confused by the “Go Ask Alice!” cite. I thought that AIDs could be spread through sexual contact between humans and apes?