What is love, really?

I often think of a scene from Yours, Mine and Ours with Henry Fonda and Lucille Ball. They have blended their families and have 18 kids.  The night that Lucille Ball’s character goes into labor, one of her daughters, Colleen, is being pressured to have sex with her boyfriend, Larry.  She is fighting him off when one of her stepbrothers, Mike, punches Larry.  He deserved it.  Frank steps in to break it up and asks what the problem is.  Here is the dialog:

Frank Beardsley:  Will someone tell me what’s going on here?

Larry: Nothing, that’s the whole problem with your daughter,.

Mike and Larry start fighting again when they hear a crash, that turns out to be Larry’s motorcycle being run over by the car one of the other sons is pulling out of the garage.

Frank Beardsley [to Colleen, who is crying]:  Are you all right?

Colleen North:  Please I can’t talk to mother right now and I’ve got to talk to somebody.

Frank Beardsley:  Well, talk fast.

Colleen North: Well, Larry says he'll never speak to me again unless I grow up. He says that I'm being ridiculous and I don't love him, but I do love him. Am I being ridiculous?

Frank Beardsley: You're not being ridiculous.

Colleen North: Well, do all the other girls, like Larry says? And am I just being old-fashioned?

Frank Beardsley: The same idiots were passing the same rumors when I was your age, but if all the girls did, how come I always ended up with the ones who didn't?

Colleen North: But it's all different now!

Frank Beardsley: I don't know, they wrote Fanny Hill in 1742 and they haven't found anything new since.

They come into the bedroom where Lucille Ball’s character, Helen is lying on the bed.  Frank helps her up and starts taking her down the stairs.
 

Colleen North: I know this is a terrible time to talk about it, but Larry says...

Frank Beardsley: I've got a message for Larry. You tell him this is what it's all about. This is the real happening. [He points to his wife, Helen] If you want to know what love really is, take a look around you.

Helen North: What are you two talking about?

Frank Beardsley: Take a good look at your mother.

Helen North: Not now!

Frank Beardsley: Yes, now.
[to Colleen]

Frank Beardsley: It's giving life that counts. Until you're ready for it, all the rest is just a big fraud. All the crazy haircuts in the world won't keep it turning. Life isn't a love in, it's the dishes and the orthodontist and the shoe repairman and... ground round instead of roast beef. And I'll tell you something else: it isn't going to a bed with a man that proves you're in love with him; it's getting up in the morning and facing the drab, miserable, wonderful everyday world with him that counts.
[Leaving the house, they say good-bye to the little kids]

Frank Beardsley: I suppose having 19 kids is carrying it a bit too far, but if we had it to do over who would we skip... you?

Helen North: [getting into the car] Thank you, Frank. I never quite knew how to explain it to her.

Frank Beardsley: If we don't get you to the hospital fast, the rest of it's going to be explained right here!