Hi
This would apply for both the giver and receiver. We find that STI like gonorrhea, herpes, chlamydia, syphilis and HPV can easily pass to giver and receiver when performing oral sex on a penis without a condom.
Here is a link to the know your chances charts.
We don’t see STI passing when a bare penis is rubbed on underwear.
Let us know if this does not answer your question or if you have anymore questions or concerns.
Health Nurse