Thanks Mel for sharing. I especially like your slideshow. But on the subject of erections, boys are often born with erections and get erections in the womb. Erections in fact are necessary to penile health to prevents blood stagnation. Nocturnal erections are about 4-5 times per night. Here's some indepth information for when your son is ready:

Dr. John Taylor penile and heart researcher - Sexual Function of the Dartos Muscle (loosely):
Upon erection the Dartos muscle tenses creating a one-piece solid skin tube, where any action on the penile shaft is transferred to act on the erogenous Taylor's Ridged Band and through its loop to the Frenulum, this action it transferred to act on the erogenous Frenulum, together the male's sexual nexus. No action on the shaft is wasted on these sexual structures.

Circumcision always removes all of the erogenous Taylor's Ridged Band and part to all of it's connecting Frenulum. Having this hangman's noose of the male's sexual receptors missing no longer keeps the whole of the penile Dartos muscle tense. All action on the erect penile shaft is wasted to act on the Ridged Band and Frenulum. Action must be applied directly to the Frenulum remnant, if any remains.

Circumcision cuts off 65%-85% of the male's sexual receptors (85% when the frenulum is cut or scraped off infant). This leaves 15% sexual receptors located in the glans corona where it's overpowered by the more populous pain/thermal receptors, ratio 5% to 95%. It is this case that men report "If I felt anymore sensitivity, I think I would die of a heart attack!" (Larry David) Circumcision changes the way, means, and type of sensations felt. Circumcision sexually handicaps. The dartos muscle also is longitudinal to the penis but as it approaches the glans, the dartos begins to tranverse and at the glans is tranverse. Meaning the foreskin thus has more cnstricting abilities than that the shaft skin. Furthermore, the thichness of dartos muscle can differ among men, some thicker than others. Thicker dartos shows tighter scrotums and presumeably tighter foreskins.

Intact men can also orgasm hands free by doing Kegal excerises while erect. Each Kegal enlarges the glans enough to  draw back the foreskin a bit. Repeating Kegals stimulates both the foreskin and glans enough to climax.

The number of sexaul receptors of the ridged band decrease as it loops dorsal. But opposite this decrease, the sedxual receptors in the glans corcona equally increase, thereby maintaining the same amount of pleasure receptors going around the shaft. The corresponding difference in amount of sexual receptors should heighten the awareness of position. The two sensory positions should be considered stereoscopic thus creating pleasure in breadth and depth. (Breadth and depth are what is missing after circumcision according to some men who chose circumcision.

Intact men have erect penises 8mm longer tan circumcised penises. This is anaverage, whch means there can be wide variations.

Also consult Gary's "Lost List"; gloosary of the intact penis at www.circumcstitions.com/glossary.html http://research.cirp.org/ www.norm.org/frenular.pdf