Demonization of sex is bad.
Demonization of sex has bring many things to our society :
-Rape, as a practice of men (and women) who demonizes themselves
-Sexual restraint, that leads directly to rape
-A-Sexualizing kids (because they need to be pure) wich lead to teen pregnancy, more demonization of sex, and eventually pedofilia.
Sex is something good, and a romantic moment in wich you express mutual love.
Love is good.