Valentine Flowers for My Post-Doc: Am I Crossing the Line?

It is never good to get involved with your coworkers,more so whom in the picking order below you. However, that should not mean that all human emotion should be off. Work flourish when there is a good working atmosphere of genuine respect, politeness and to some extend some friendly and expressed -nonsexual- affection. I believe giving some flowers or a bottle of good wine, humorousc card, etc,--- but not one or a dozen red roses or explicit cards-- are fine. I have done that frequently and had never a problem, just he opposite. If you are serious, talk to a colleague (and then explain it to her) to transfer her to a different lab before you get really involved.