Both sitting facing each other, legs wrapping round each other, pelvis forward and pubic bones hard against each other. Allows for a slow, sensual start with lots of kissing, stroking, hair tugging, face, neck, breasts, hips, arse, spine all in easy reach. Lean back as things build for longer, harder thrusts, clit right there under your thumb for a bit of extra sensation for her, straightening your legs out behind each other for still harder thrusting rocking together. As leisurely or frantic as the mood takes you, good position for taking your time with a bit of ebb and flow.
Obvious and unimagintive it may be, but when something works this well why complicate things, girl on top's always a good one, specially sunday morning sex when I've just woke and ain't quite got the energy for anything too vigourous till I'll have had my bacon sarnies and coffee in bed, so if someone's been pawing at me to try and wake me up slowly to take advantage of the morning wood cos they've been horny for hours, well, they just better be prepared to put enough effort in for the two of us. When being a bit more active I quite like a bit of breath play sometimes, very easy for a partner to restrict the breath with just a little pressure to the side of the windpipe and down on the carotid, fine control, nothing too risky.