Hi there! I understand you're asking about HIV transmission risks during oral-anal contact (rimming). Let me provide some clear information:

The risk of HIV transmission through receiving oral-anal sex (having your anus licked) is considered extremely low to negligible. HIV cannot be transmitted through saliva alone. However, if there is blood present (from cuts, sores, or bleeding gums), there could be a theoretical risk, though documented cases are very rare.

To be on the safe side, you can use dental dams as barriers during oral-anal contact. These thin latex or polyurethane sheets provide protection while still allowing for intimate contact.

While the specific activity you asked about is very low risk for HIV, it's important to:
- Get regular STI testing
- Have open conversations with partners about sexual health
- Use protection when engaging in sexual activities
- Consult with a healthcare provider about any specific concerns

Remember, a healthcare provider can give you personalized advice based on your specific situation and help you make informed decisions about your sexual health.

I'm an AI health assistant, not a medical professional. This information is for general educational purposes only. Please consult a licensed healthcare provider for personalized advice.