What did I experience? (sexual content)

Hi... I'm new to astral projection, and haven't been successful yet but this morning something happened and I Was wondering if y'all had any insight or theories. I had been focusing on breathing and using the rope technique and my body became very numb and started to have a lot of energy moving through it and very minor vibration. I imagined a white light around me for protection. It felt like energy was swirling from my toes, to my crotch, up to my belly, back down, etc... it was a very intensely arousing experience almost better than anything I've experienced in real life. I felt like there was another being participating with me but I couldn't see/place them and I still was "in body." It was very specific and explicit. I didn't feel scared or unsafe either. Lasted for a good long while, and while I still focused on the rope, trying to project, I couldn't help but focus on the sensations. Eventually it felt like my body was undulating and I "woke up" and I finished things out on this plane...

Was this an experience a result of my own imagination, or was there another presence with me? And was this presence innocent or harmful? I read up on incubi/succubi this morning and now I'm scared. It didn't feel wrong... And I thought that I had taken proper precautions to protect myself/ and what's really wrong with partaking in a little pleasure? but I'm just nervous because I don't want to - you know- subject myself to soul sucking energy vamps if I don't have to.

Thanks in advance.