There's probably some practical advice in my head.
Have you tried standing with your legs further apart? No reason, I just like the image it conjures up.
Seriously though, work on your balance. Try some Tai Chi or Yoga.
if i were you, id just make sure your partner is bent over something sturdy, then when you cum you can lazily fall into her, and she can support you. if you have the energy you could run your hands over her and bite her neck...she might even like that!
69ing always falls apart for me when I start to come - I can't keep up my end of things as it were.
Although there are no falling over issues, I still wish I could concentrate on my sucking at the same time as my coming.
Maybe imagining Splendid toppling with her strap-on will be the best delaying tactic of all!
why would you want to stop yourself cumming? :shock:
make them 'straddle' you...sorted!
lp