Im a Danish guy and for years I have been having anal orgasms but not like most of you describe it here. When I start fingering myself I try to massage the prostate, sometimes I use a dildo first but it will not give me the right orgasm.
So I put 2 fingers in and out in a fast rhythm , I continue for maybe 10-15 minutes then I can feel Im close to the climax, Im getting wet inside me (Im not using lube) and so it just explodes inside me! Out of my asshole a lot of liquid juice and its a sensational feeling that goes through my body, possibly the same feeling as a pussy? Then I just relax a few minutes to enjoy it but Im not finished, I do it again and will have maybe 5-6 orgasm in the same way but not as much juice coming out. The juice smell like sperm but its thin.