It's not just true on "I Love Lucy." If a man is sharing a room and sleeping in a twin bed, one things is for certain: That guy is not getting laid.
Katie and I were talking the other night about men and twin beds, and she said, "There are only 3 times when a man should be sleeping in a twin bed and sharing a room. When he's a little boy, when he's on a mission, and when he's in college. But that is it. There is no reason for a man to be 30 and in a twin bed, still sharing a room." To which I proceeded to illustrate that two best friends (men), used to work for the same company, share the same room, and slept in...BUNK BEDS. I won't even get into the matching company cars and sync'd Milli Vanilli soundtracks. In any case, raised eyebrows at work aside, neither one got married until AFTER they'd moved away from each other and got queens. They're now married with kids and definately not gay.
Now, I recognize that (due to a little something called "morality"), NONE of us are getting any. However, the point is, that until you get out on your own, little soldier, and get a bed big enough for the both of us; no self-respecting woman is going to bed with a man who still lives like a boy.
Conclusion: If you are a man and are still sleeping in a twin bed and sharing a room, the chances of you getting a woman in there are about as good as Ricky Ricardo's. And that guy was already married.