T
Truthman
He says receptors are in the penises' smooth muscle. Now the penis may be moved by a muscle in the body (twitch twitch), but the penis itself is not a muscle by far...
It is spongiform erectile tissue, it fills with blood to get hard - there is no muscular action involved w/ your dick getting erect. Plus I have never heard of a pot smoker having erectile difficulty, have heard more of this from heavy drinkers by far (whisky dick)...
Cardiovascular problems can also cause loss of erectile function, but cannabis sure does not.
Hehe I read this on Yahoo page this AM. Instantly thought "how long before I see it on here? Did ya check the comments? They are fooling no-one, just putting their feet firmly into their facial orifices...
Peace
It does have smooth muscle areas so it may have thc receptors.
http://www.menbodymind.com/
"Physiology of erection
Excitatory stimuli from the central nervous system pass through the autonomic nervous system and produce erections through a variety of neurotransmitters. Many neurotransmitters including acetylcholine (ACh) and vasoactive intestinal polypeptide (VIP) contribute to erectile function. The most important neurotransmitter in the corpora cavernosa is nitric oxide (NO), NO functions via the cyclic guanosine monophosphate (cGMP) system. It is is produced from the precursor L-arginine by the enzyme nitric oxide synthase (NOS). The secondary transmitter eGMP is ultimately responsible for smooth muscle relaxation in the corpus cavernosum and producing erection. The relaxation is mediated by calcium efflux from the smooth muscle cell"
"im high"
and if your lucky, another one of these... 
