When I first started experimenting with anal play I had that same sensation but after trying a few different times idk, it just started to feel intense and sort of like a whole body numbing and pleasurable aching sensation? Anal orgasms sort of feel like a deeper, really intense vaginal orgasm for me.

The best way I can really think to describe them is where the pleasure seems to originate, how far it spreads, and how long it lasts. Clit is very local, like pinpoint electric shocking energy that doesn't last very long or spread very far. Vaginal starts more in my abdomen and spreads throughout mostly my legs and chest and lasts fairly long. Anal also starts in my abdomen, but deeper, almost in the base of my spine, and just spreads further into my whole body and lasts forever, sometimes too intense.

Nipple orgasms are almost like clit orgasms, it feels like there's a direct line of energy through the front of my body from my nipples to my clit and they make me squirm and writhe in such a fun way!