^That isn't entirely true. For the guy it's similar risk. For the girl, pussy slides are less risky because the guy isn't ejaculating inside her.
A little inaccurate. Pussy slides are far less risky than full out BBFS. Changes for transmission of infection are much greater when the penis is inside the vagina due to lack of oxygen and other factors that let viruses thrive. Exposure to oxygen kills many viruses. If it's a fairly non invasive pussy slide then the risk level is same as BBBJ