As far as I know, inert gases are used in MIG welding - argon, helium .. You can search more information at Theweldingpro.com. Here they give good advice for beginners and do regular reviews on new welding equipment. Maybe it will be useful for you. My husband, on the contrary, prefers to use the TIG option now.
It's stupid to mix porn and money. If you like adult videos, just watch it and have fun. Personally, I like sex games more. There is a bunch of interesting stories and the opportunity to participate))). If you think this isn't sharp enough, then you just haven't tried it. I think this option is better than trying to make money depriving yourself of pleasure.