"gaymen-sex" is a combination of two terms. Let's break it down:
1. "Gaymen": This term refers to homosexual men or, in the context of pornography, adult male performers engaging in sexual acts with other men. It may also be spelled as "gay man", but the hyphenated version is more common in tagging porn videos.
2. "Sex": A broad term that generally encompasses any form of sexual activity or intimate contact between individuals, specifically in this case referring to adult males engaging in such activities with one another.
In summary, "gaymen-sex" describes a video category featuring sexual acts performed by homosexual men. This tag is used to identify adult content involving two or more male performers engaging in sexual activity for the purpose of entertainment and/or arousal.