Spread legs.

I quite like spankings on the lower and insides of thighs, so you need spread legs for that! I agree it probably doesn't fit with the authenticity of, say, school scenes, but for others I do not mind it at all.

Its never bothered me in stories and in real life I spread my subs legs all the time even if its a punishment spanking. Spreading the girl in questions legs make it easier to work on her sit spots and thighs.

I look at it this way. Demanding that the legs be spread forces the spankee into feeling air movement in the most private of places. This feeling of exposure should enhance the embarrassment and vulnerability at being in his/her position. Fine with me. I also like it in the videos so long as the genitalia isn't actually hit by any implement. That would be a huge turn-off for me.

But, what is the spanker's ulterior motive? To gain access to one inner thigh and one outer thigh? Why not just access the back of the thighs only?

Incidentally, if you have never been turned over and spanked on the front of the thighs, expect to squeal through some big time pain if you are. Kinda hot though ....