Unless I am really off base, I am sure the sperm left from the testes, after being tied off and isolated from the prostate and bladder, is adsorbed back into the body in the scrotum. That's what I was told at my vasectomy, which is just a lower down version of the removal of the prostate and assorted parts. I would expect the feeling to subside, with time. If I recall correctly, I had the same short pain/ache for a while after my first few.
James C., Age 64, Kingsport, E. TN
Gonna Make Myself A Better Man tinyurl.com/28e8qcg
4/07: PSA 7.6, 7/07 Biopsy: 3 of 16 PCa, 5% involved, left lobe, GS6
9/07: Nerve Sparing
open RP, Path: pT2c, 110 gms., clear except:
Probable microscopic involvement-left apical margin -GS6
3 Years: PSA's .04 each test until 04/10-.06, 09/10-.09, 12/10-.09, 02/11-.08