"I'm not gay, sure I fuck around with dudes but I'm not gay"

What a fuck buddy told me yesterday. We met on tinder and we kind of fuck around with each other. I saw on his phone a guy message him😘😘😘. He opened the text and I saw he had a lot of guys in his dm. I'm not surprised that he was hooking up with other people. Just that they were guys. I asked him was he gay and he said "I'm not gay, sure I fuck around with dudes but I'm not gay". He has stage 4 cancer and he's not receiving any treatment. He said the treatment wouldn't cure him, it would just prolong his life a little. So he's decided he's just gonna die. How he said he sees it is if he's gonna die just live life to the fullest and try everything... Including dudes... So he flirts with everyone. Has sex with everyone (protected) and doesn't give af. He said he doesn't have time for labels because he will probably be dead before 2023, but he just wants to fuck around, whether they are cis men or women, trans men or women, nonbinary. He is just gonna live his life and not give af. I just found this all so interesting and wanted some opinions.

Edit: We have protected sex. Idk if it's a cover up since we live in San Francisco, literally the gayest place to live and from what he said his dad is bi. But maybe I'm wrong. Either way I found it interesting.

Also we both got tested before we started this and since he has sex so much he gets tested more frequently.

The most proof I have of his cancer is his family posting how strong he is and cancer can't beat him. I'm just a fuck buddy. Seems inappropriate to ask for documents of that. I do ask for his negative STD tests though.