I would ask the oc that did your surgery. Was it a Urologist that did the surgery? If not that is who I would suggest going to see.
Hi,
From which part of prnis did you remove the extra skin?, you mean the foreskin covering the head? Also, do you mean to say that your erected size and ejaculation is normal?, in that case I personally feel it should not matter, since it is doing its biological function well.
Your best bet will be to ask the doctor who operated whether the new behaviour is alright or not. Some times such effects could be a short term side effects of the operation and will get resolved in due course.
Intuitively, I feel it is due to reduced blood flow to the organ and might help if you do some pelvic exercises to promote better blood flow .Food items which provide your daily quota of Vitamin E and zinc should generally be helpful. Some yoga exercises like ' Padmasana ' ( Google for details) combined with deep breathing exercises will promote blood flow to the penis. What ever you do, do it in consultation with your doctor and for Yoga exercises, learn it from an instructor.
Good luck,
Solace