Why is the couch so much more enticing to sleep on than the bed sometimes?

It conforms to the contours of the spine and alleviates pressure from the various parts of the body when sleeping.

No one snoring next to you?

The bed may come with the extra baggage of insomnia, and the couch with moments of serendipitous narcolepsy.

Because you're already there - going to bed involves getting up!

Especially in front of the TV.. drifting off.... WAKE UP! lol ;)

So I guess I am not alone in this assertion?!

Cum stained sheets ?

Just cozier

This is because the couch isn't infested with bed cooties and critters that live off human skin. When you sleep on couch, nothing is eating you.

Sometimes, the spontaneity of it all. Lie down and zzzzzzz.