Kunyaza is a traditional sexual technique done by some people in Rwanda and surrounding areas for thousands of years.
It involves a man tapping and rubbing his partner's vulva (private parts) with his penis. This can be done in different ways, but the basic idea is to focus on the clitoris (a small part of the vulva that can feel good when it's touched or stimulated).
The man may also squirt water onto the vulva during the process, which can create a tingling sensation.
Kunyaza is considered by some people to be a way for women to experience sexual pleasure and even have powerful orgasms. However, it's important to remember that not all women enjoy this technique, and it's important to always ask for consent and communicate with your partner about what feels good for them.