Growing up I was always exploring new ways to get aroused, even from an early age.
Most of my gay experience revolve around masturbation: Most notabile - Being aroused by sight, smell, and taste of my own penis and cum/precum and the amazing feeling I get when I masturbate. I also tend to edge for hours when I look at any porn and build up a huge orgasm
Went through a phase of exploring anal sex - mostly insertions of various sizes from kitchen appliances and fruit/food to a huge double headed dildo, I found when I was babysitting - Probably around 12-13 years old. Hadn't thought about doing recently until I started to quit porn and found myself exploring again.
A span of about 5 years where I would perform auto-fellatio almost daily. I have always been flexible and became quite skilled at pleasuring myself. I enjoyed posting small video clips of this as well to the net. Got a bit out of control, when I was at the Y in the sauna and the lights were broken. I was by myself and started to self suck. About to cum and the manager came around the corner (there was a small window in door). I popped my head up just in time to not be caught. I came right after he checked to see if I was OK that light was out. I remember that very vividly and fantasize about it to this day. In order to practice getting deeper, I would practice deep throating a banana while I was in my car, and no one was watching. Same situation here - fantasizing about starting again since quitting porn.
As far as Gay Porn, I was in the habit of posting animated gifs of myself masturbating and cumming online. When I started it was in general sex threads and I thought it would impress the ladies. As I did it more often (sometimes multiple times a day) I started to get lots of compliments from guys. They started re-posting on site and eventually Gay sites. Finding that someone posted your content on another website is the biggest Dopamine rush on the planet. I would use keyword searches in Google Image to see if I could find copies posted elsewhere. I would sometimes spend days looking through various gaysites to build up my collection. I would be masturbating the whole times and found I really enjoyed gay porn too. Mostly cumshots, erections, and oral sex, rarely with faces shown.