Ok. CC growth, that means tunica growth actually, I suppose - tunica envelops CC, so you can’t notice a wider penis due to bigger CC directly, that’s the circular tunica becoming longer and CC can expand more.
About CS, I can make two hypothesis. First one, is that there could be fluid accumulations. The second, is that, if you Kegel while clamped, you strengthen the BC muscle. This could cause an higher pressure in the CS, leading to a more pronounced protrusion. I’m making this hypothesis basing on this:
"The Corpus Spongiosum Penis Pressure and External Penile Muscle Activity in the Goat During Coitus
SIDNEY D. BECKETT,
RAM C. PUROHIT and
TED M. REYNOLDS
needle-tipped catheter was implanted in the corpus spongiosum penis (CSP) of mature male goats to determine the pressure during coitus. Electromyographic (EMG) electrodes were also implanted in the ischiocavernosus (IC) muscles and bulbospongiosus (BS) muscles to monitor their activity. During coitus the mean peak CSP pressure was 1031 mm Hg and this peak occurred during the ejaculatory thrust immediately after the peak corpus cavernosum penis pressure. Anesthesia of the BS muscles significantly reduced the peak CSP pressures of the coital period; however, it did not change the normal, precoital, and postcoital pressures. The EMG activity of the BS muscles was in phase with CSP pressure peaks. "
Analogously:
"Corpus spongiosum penis pressure and perineal muscle activity during reflexive erections in the rat
M. H. Schmidt,
J. L. Valatx,
K. Sakai,
G. Debilly, and
M. Jouvet
………
Reflexive erectile events were systematically associated with an increase in baseline CSP pressure. Glans erections were associated with dramatic suprasystolic CSP pressure peaks concurrent with BS muscle bursts. Indeed, measures of CSP pressure and BS EMG activity were found to vary significantly with the intensity of glans erection. Flips of the penile body, however, involved small CSP pressure increases and IC bursts. These data demonstrate for the first time that both CSP pressures and perineal muscle activity vary significantly with the intensity of penile erection. "
http://ajpregu. physiology.org/ … 4/R904.abstract
If this is true for humans too, than basically clamping leads to stronger erections, which could cause an expansion in girth due to the higher pressure in CS. What you do think about?