Truffle butter is a slang term for the tan substance that’s created when fecal matter combines with vaginal lubrication and seminal fluids. This can occur when anal sex is followed immediately by penetrative vaginal sex. Making truffle butter is not recommended because the anus contains bacteria that should not be introduced to the vagina as it may lead to infection.
Truffle butter is, of course, also a compound made with butter and truffle mushrooms. The term as used in a sexual context is therefore tongue-in-cheek, as it compares this expensive delicacy with something much more taboo.
The term truffle butter first appeared in the Urban Dictionary in 2015. The term may have been introduced into popular culture by Nicki Minaj's 2014 song by the same name, which refers to the sexual act.
More About Truffle Butter
Creating truffle butter is a taboo act, as with many sex acts involving anal sex. For this reason, it can be very arousing and attractive for some couples. However, while it poses minimal health risk to people with penises, it carries significant risk for those with vaginas as it could lead to urinary tract or vaginal infection. If the sex is unprotected, then there is also the usual risk to both partners of a host of sexually transmitted infections (STIs).
Any couple wishing to have anal sex followed by vaginal sex should ideally use a different condom for each sexual act to stay safe. Monogamous couples who have been tested for STIs could more safely move from anal sex to vaginal sex if the penis is thoroughly cleaned between sex acts. However, since washing removes fecal matter, the vaginal sex won’t create truffle butter. Using a water- or silicon-based lubricant for anal sex will also reduce the risk of tearing. A torn anal lining provides an easy entry point for STIs, hepatitis, and other viruses.