Thanks for sharing your story. I have been avoiding fusion for years, but left-side sciatica has acted up a few months after my hip replacement. I am terrified about that surgery. Right now, I'm just going for a nerve block, although I know that only delays the obvious. Getting older with spine issues is not fun at all, as you know very well.
For sex, are you okay? (I figured you were asking about Trimix.).
I am sorry to hear about the residual drop foot. I hope that gets better as healing occurs. I have read that it takes up to a year for recovery from anterior fusion.
Like you, my issue is at both the L4/L5 and L5/S1 levels. Two discectomy surgeries in the past. Gladly, cables and machines at the gym have kept me from losing muscle.
My spine is congenitally straight, with no curvature that would help distribute weight. The clinical term for a "straight spine" is usually referred to as "hypokyphosis" or "flatback syndrome". Normally, the human spine has natural curves for shock absorption and balance. These include a mild forward curve in the neck (cervical lordosis), a mild backward curve in the upper back (thoracic kyphosis), and a mild forward curve in the lower back (lumbar lordosis). When these curves are reduced or flattened, it can cause various problems.