Et Cetera

Johns Hopkins researchers say they have discovered what may be the essential signal that triggers erection: a tiny secretion of nitric oxide by penile nerves. An ointment that promotes the production of nitric oxide might alleviate impotence; one that inhibits production could relieve priapism, prolonged erections unrelated to desire. Also, if nitric oxide turns out to rouse the clitoris, medicated cream could help women reach orgasm.