Subspace has different depths and textures (some versions are driven almost entirely by testosterone others more by endorphins). A Domme told me that there is a small subset of her clients she has no idea what dimension they are in late in the session. She has grown used to that phenomenon but still says she is glad that I am not one of "those guys".

"co-topping" The session idea Mistress Natalie and I tossed around would have had me in a submissive role at the beginning but switching to co-topping around midway.