seduction tips for serial hangoverists

Do:
talk delighted rubbish at your intended target
invite them to help tackle putting the duvet cover on
invest in considerable quantities of wine, chocolate and strawberries, and possibly have fridge magnet letters at your disposal
have an evening of sparkling wit and hilarious misunderstandings

Don't:
throw your drink over them
tell them that you've loved them from afar for years
make it immediately clear that you're a complete mentalist
ask, when half awake, if you can 'have a huggle'. (there are no adequate words to describe the 'sink through the floor' feeling)