PSA: Safer Sex charts

[anotheranon]

Different activities and their relative risk of STI infection, from Violet Blue's Tiny Nibbles. I wish there were sources/footnotes/other documentation, but it is from a book which I'm going to assume was fact checked.

Here's one from the San Francisco City Clinic, but it is not as comprehensive or detailed. Again with the lack of sources but I'm going to assume they fact checked too.