From what little experience I have....
1. During my longterm relation I did like tying up my GF, but also enjoyed her restraining me and teasing the hell out of me. However, those were more bondagegames then domination. Still, when pulling some "pranks" on her (she did spent a weekend almost naked in a cabin, also was once discovered while tied to a pole...) I was surely not the sub

2 In my recent online adventure I really was turned on by dominating the slave, in fact that was how it all begun!! Somehow, mailing with her put me in a "domme mode" and had some asthonishing results.
However, from the first moment her mistress mailed me I simply couldn't help but desire to please her, to do as she asked. That woman read my mind as an open book....and as written before, despite the struggle and the fight I could not but surrender to her. Somehow mailing with her switches (...) me into sub-mode, something she of course noticed right away...

Leaving me confused still: I still dream of having that cute girlfriend that likes me to dominate her, tie her up (as in the pics of my former alter ego, Boundtowrite) And looking at tied up guys doesn't turn me on for a second...but that idea of being forced to surrender to a woman, yes...definitily a turn on...