Yes, I’ve been in sub-space a few times, mostly during tickle torture sessions and impact play sessions. It’s a feeling that comes along when you hit that right stride as Dom and sub and it’s almost like your communicating telepathically… your whole body feels tingly and the world seems unreal and euphoric. Doms can get into Dom-space (another thing I’ve personally experienced), and just like subs experience sub-drop, Doms/Tops experience Dom-drop. Aftercare is such an important aspect of any scene for both the Top and the bottom and should always be discussed (along with limits and safewords) prior to any play. Safe words should be re-confirmed during play if you notice the sub slip too far into sub-space, and once play commences limits should never ever be crossed or even asked to be crossed.