with regards to pumping and PE, I myself suffer from PE and pumping has on occasions caused a slight numbing effect which has helped delay ejaculation. Although saying that this only really happened when i had overdone it with the pumping when i first started.
i limit myself to 3 x 10 mins sessions on 5Hg of pressure, which is more than adequate, although there is no delay with ejaculation.
Whats your pumping programme? and what pressure are you using?
be interested to see if any other members have had the same effects?