Catching STDs from foreplay

Q: Can I get an STD [Sexually Transmitted Disease] from sucking on a girl’s breasts? From fingering a girl in the vagina?

Dr. Klein: The possibility of getting an STD in these ways is very small. If the woman is currently breastfeeding, it is theoretically possible to catch a virus from her breast milk. And if you have a cut on your finger, it is also possible to catch something through her vaginal fluid. But both of these are extremely unusual.