This code is slightly tongue-in-cheek. It is what Italian Romeos are supposed to say to visiting tourists. The value is that it can be said with total sincerity. After all, 'eternity' may not last longer than next Monday. Of course, the second part of the statement is said very, very quietly or under one's breath.
The beauty of this code is that it allows someone to say: 'This is what I really feel at this moment. That is totally true. But I cannot guarantee how long the feeling is going to last. Do you want to come along for the ride?'