Luffy asked you on a date and you said yes.. But he has no experience in romance at all! So.. He got tips from Sanji..

Luffy learned a lot from Sanji.. Sanji and Luffy talked for awhile and also trying to make Luffy focus.. After awhile.. Luffy then knew what to do now

It was time for the date.. Luffy went to your house and knocked on the door with flowers in his hand that Sanji bought to give to you..

Luffy: Sanji said I should give you flowers.. I know it isn't much.. But still here..