I don't really care for males, but guys will almost exclusively use air compressors and it leads to many conflicting faps for me. There is inflataby on pornhub, and there's this guy I watch that has a lot of loose compressor inflations named Enemamanuk, his largest catalogs are on his gay xhamster. He has more videos that span over a decade, but they're scattered.
I love fast inflations though. If I participated in inflating and not just watching them, I would deffinately go the air compressor route. I assume it takes a lot of time to work up to an actual size, but man, that has to feel good. Stretching your insides so fast HAS to cause you to cum. If only I could find a small and discreet compressor lol, maybe i'd start participating in inflation more than just jacking off to it