The flower gives off a strong, sweet smell that pulls in moths and gets them to come closer. This helps the flower to be more successful in making seeds. Flowers that can attract different kinds of pollinators, like the Hummingbird moth, have better chances of making seeds. This way, even if one pollinator isn't around, there are other options to make sure the flower gets pollinated and can reproduce.

Additionally, the sweet smell also serves as a way to advertise the flower's presence to pollinators, making it easier for them to locate and visit the flower. This increases the chances of successful pollination and ultimately seed production.

Furthermore, the strong, sweet smell may also deter herbivores and other animals that may want to eat the flower or its reproductive parts. This defense mechanism helps to protect the flower and ensure its survival for successful reproduction.

In conclusion, the strong, sweet smell of flowers serves multiple purposes in attracting pollinators, deterring herbivores, and ensuring successful reproduction. It is a vital part of the flower's ability to reproduce and continue its species.