Why do I feel incredibly aroused when high?

This stuff is legal, and Ive only smoked marijuana a handful of times, but it was so much more intense, and pleasurable. So i decided to go try to orgasm, and it came so easily! Ive never been able to by myself. When someone would begin to play music, I physically felt "full" in my vagina, and I had never felt like that either sober. Is it normal to hallucinate while high and have a high heart rate? My laundry on my floor looked like a face that was kinda scary and i kept seeing the profile of a man who was not really there. Scary yet pleasurable. I felt so alive, like my body physically was textbook aroused to the max, i could just touch myself once and become so wet. Why cant that happen when i'm not on this stuff? And marijuana just makes me laugh excessively and walk around, THIS stuff is like pleasure island compared to marijuana.