A Dom should feel in control of himself and his charge. For me preforming oral sex with my sub is still a matter of control. I do so when I wish, how I wish to do so and either to tease or to give pleasure. A dom should not deny themself or their sub from something they both enjoy. To simple not do so for fear of diminishing ones 'image' is to admit your self image already needs real work.

For myself I enjoy teasing a sub to a nearly mindless state of pleasure and dragging that state out over a very long period of time. To savior a subs desire and need for release and their struggle for self restraint as you wish.
It is a sweet game that a talented toung can make last far lounger than almost any other method.

Daumon