"Kinkyboinc" seems to be a creative combination of the words "kinky" and "boyfriend." The meaning behind this porn video tag can be understood as follows:
Kinky: Describes activities or behaviors that are unconventional, non-traditional, or outside the realm of what is generally considered normal in terms of sexual behavior. These acts may involve BDSM, role-playing, bondage, or any other form of unorthodox sexual activity.
Boyfriend: Refers to a male partner who is in an intimate relationship with someone. This could be a long-term partner, a casual lover, or anyone who shares a romantic or sexual connection.
In conclusion, the porn video tag "kinkyboinc" likely represents content that involves a kinky, unconventional sexual encounter between two people in an intimate relationship, such as a boyfriend and girlfriend or other close partners. This may include various types of BDSM play, role-playing, or other kinky activities that deviate from the norms of conventional sexual behavior.