"Str8-to-gay" is a term used in the adult film industry to describe content where heterosexual men are exploring or experimenting with same-sex activities for the first time, typically within the context of a pornographic video. This tag suggests that the performers involved may have previously identified as strictly heterosexual but are now engaging in homosexual acts on camera. The purpose is often to showcase an "authentic" first-time gay experience or the process of these men coming to terms with their sexuality. It's essential to note that this category is specifically for adult audiences who are familiar with and have a mature understanding of such content.