Probably worth noting that, if you are using an employer owned system to watch said porn, they likely have software on the endpoint which will let them see what porn you are watching, regardless of HTTPS/VPN/Tor. Depending on how much your employer cares about such things, that may or may not come back to bite you. I've worked at places where we regularly reported on users watching porn on work computers, and I've worked at places where we only reported on users getting malware while browsing porn at work. But, never assume your activity isn't being monitored on employer owned systems.