I haven't done it since I passed 60, but about 40 years ago I had a gf who was non-orgasmic. I tried everything with her, including pot. A doobie or two had no effect, so we tried some hash. The issue with hash is that I would get a humongous and persistent boner, and all her nerves got very sensitive and didn't want me to touch her, so she ended up blowing me about six times. The next morning she said it was the best sex she had ever had. We did it many more times, but I still don't get it.