Sort of almost aroused is that special state of being where you have so many distractions and so much stress that it is almost impossible to really care whether or not you actually get laid. This is a frequent cause of marital problems and often leads to infidelity. Sort of almost aroused also happens when you aren't really sure if you are excited by something. For instance, an unattractive woman comes on to you, making it clear she wants to have sex with you. The penis gives a slight little twitch as if to say, "Don't go out of your way on my account", only to be completely silent and immobile afterwords.
Only a long absence from sexual activity can keep you from being sort of almost aroused but as that involves a long absence from sexual activity most people don't practice this method of treatment.
This condition often manifests later in strange semi sexual dreams. Doing vaguely erotic things full clothed and often to random objects. Like that dream you had the other night where you where walking around with a alarm clock attached to the crotch of your pants. Every time the arms struck 12 the alarm would peel loudly and everyone would look at your crotch and point to invisible watches on they're wrists.