Isnt CIM and swallow all about having a submissive partner?
If said partner was told rather than asked etc...
To some extent, there is a bit of sub/Dom in all sexual relations. Minute, I'll admit, but sex is also about trust and care as much as it can be about cumming and going (pun intended).
This includes vanilla punting positive, neutral and negative.
Bdsm sub/Dom tends be called so because it is outside if the scope of mainstream punting, which ia outside of the scope of mainstream sexual relationships etc...