Fluid bonding is the practice of sexual partners who explicitly choose to expose themselves to each other's bodily fluids.

The usual motivating factor is greater enjoyment of sex without barriers, latex or otherwise. Fluid bonding is often performed after both partners have taken an STD test, although some have even been willing to acquire a condition of their long-term partners in order to increase physical intimacy.

By taking part in fluid bonding, participants are effectively trusting their sexual partners with their lives. Since fluid exposure is a conduit for sexually transmitted diseases, avoidance of third-party sex, or at the least strict protective behavior with any third partners becomes more important.