Heh.
I'm sorry. I'm laughing my behind off right now. For someone who claims in the first sentence to be a writer, where is the grammar? Anyway -- tops, bottoms, dominates, submissives -- why must we all be categorized? I prefer to shake it up with my partners. I won't go as far as to say take turns, but unless there is a signed contract between two people why fall into a rut?
Discussions about sex are good, and healthy, but please refrain from coarse language and detailed discourse. If you have an issue with word choices please consult the thesaurus. Remember there are queerlings who can read this also... so manners, manners, manners!
Happy writing!
Lugh.