Are relationships the same at any age?

Baby, young or adult, do they all feel the same love when getting into a relationship?

No, because young love isn't stupid, now one knows what they feel, or just thing you are hot, that also happens with the older, but it's much more normal in the younger, but no, they are not the same

No, as a person grows up he acquires maturity and his vision about other changes. Little children in relationship will most likely think about it as a very important friendship where sharing is very important. Then young people start demanding from their couple instead of giving them. And many adults decide to have relationships based on economic interests or what they can obtain.
So the purest love will always be the one that doesnt demand anything from the other, as in kids.