What if someone had taken up one of Ned's offers?
It's interesting how many times in the movie Ned nearly takes people over to his house, but circumstances "just happen" to intervene.
At the Forsburgh's house (pool #1)...
Ned: I could run you over to our house in ten minutes.
but one of the ladies says they honestly don't have time.
Then when he meets Julie (pool #4) he barely weasels out of taking Julie over...
Julie: I'd just *love* to see them. Let's drive over.
Ned: Well, I've gotta be on my way. I'm swimming home.
Then he scares off Julie before reaching the Hallorans (pool #6)...
What if she'd continued the journey with him instead of running off?
Then he invites a lady along while at the Biswangers party (pool #8)...
Ned: Come with me, be my lover.
but she declines since he seems to be just another lecher.
Then Shirley offers to drive him home (pool #9)...
Shirley: Listen, I'll drive you home.
Ned: No! I've got to swim home.
Twice he refuses to be driven, once the company refuses to be driven, and twice people refuse to go along on foot. So many such circumstances start to make the plot seem a little unrealistic. What if one of those many people had actually taken Ned up on his offer, gone over to his house, and found it empty? His fantasy trip would've ended with witnesses, and possibly much sooner! Strange thought.