s are only contractable by sexual activity (except for things like HIV
and Hepatitis, which can be contracted by blood-to-blood contact....
and are not strictly STD's anyway) -then I would say dogs and cats cannot catch a human STD. Also, although there is a feline form of the HIV virus, and a canine form of Hepatitis, these viruses are different strains to the ones which cause the human form of the diseases.