Can I have sex with hepatitis C?

Yes, but it's best to inform your partner(s) about the risk factors with Hep C, even though it isn't an STI. As a blood-borne pathogen it can be transferred with open wounds, and rectal tearing. So if the sex is particularly rough, it might be wise to check for blood. Between heterosexual monogamous couples sexual transference is rare.

-Rick Nash Six Time Treatment Dragon Slayer and Transplant Recipient