(Several words about flower delivery)
Guys, certainly it is healthy, that you give to the girls flowers, but I want to remind you, that the rare girl loves flowers as colors. Otherwise she would raise their itself, either would collect (at summer), or would be engaged ikebana from artificial colors... If she likes large roses most soon she loves expensive gifts. If any certain flowers she loves marks of attention to the person. In any case flowers are easily replaced with knickknacks, or on perfumery.
With verses similarly. If the girl has taste to good poetry I would not advise to write to her verses. And if is not present, you can write any nonsense such as 'And you again today have not come...', can even sing, and the girl will be dragged. But not because you are talented, that is why, that you speak with her at her level about her problems. And she will keep all your marks of attention in casket and to be dragged from their presence. Queens do not happen without court.
If the girl is indifferent to you, you provoke at her growth ego, instead of love. If she already loves you, you quickly will cease to exercise the wit (men are too rational and lazy, alas). Hence, flowers and verses are necessary at a stage when you like the girl and want, that she has fallen in love with you.