The term "cbtlouis" appears to be a combination of two main concepts: CBT, which stands for "cock and ball torture," and the name "Louis." Therefore, this tag specifically refers to cock and ball torture involving someone named Louis.
Cock and Ball Torture (CBT) is a term used in the BDSM and kink communities that involves the act of deliberately causing pain to a male's genitals as a part of sexual activity or play. It can include various techniques such as pinching, squeezing, biting, whipping, or even the use of special devices designed specifically for this purpose.
In the context of this tag, "Louis" likely refers to a person involved in the act (either as the one experiencing pleasure from pain, the one inflicting the pain, or both). The combination of these two concepts in the tag suggests that this video features cock and ball torture involving someone named Louis.