What types of STDs do lesbians need to protect themselves from?

Paper cuts from the scissor party?

Gonorrhea, syphilis, genital herpes, HPV, chlamydia, All the regular, common, STDs.

How do they protect themselves?

The thing about partners, and even partners’ partners, is that the partners’ partners also may have had partners, who also have had partners, who also have had partners, etc. However, lesbian activities tend to involve less exchange of body fluids, so that helps.

They protect themselves with dental dams. Which, really, anyone having casual oral sex with a woman should use.