From one morning to another.
Friday morning my Tulips had emptied all the water in the flower vase. The position of the hanging heads was a new experience. Ready for the garbage bin or? or could they be saved.
After filling fluid in the vase the erected Tulips can be compared to Penile Erection which can occur due to a full urinary bladder. I take it for granted that the Tulips not got erection as a result of the complex interaction of psychological, neural, vascular and endocrine factors, which is usually, though not exclusively, associated with sexual arousal.
Well you never know everything about nature.