Anyone glancing up at the sky would perhaps be alarmed at the flock of Doves descending upon the castle, each one with a perfectly tied blood red bow around it's neck. Those with apt vision would be alarmed at the disfigurement of the doves, and how they from one side looked like owls.
It must be said, Barney Stinson was smooth. He knew that each and every woman; straight, single, gay, disfigured, multi genital, turns into a soppy romantic when it comes to valentines day. Sure, the transfiguration of the owls might have been a *little* off, but the effort was there none the less.
The owls/doves/dowves were heading to each and every female (excluding minors), with the following,
Dear ladies of Hogwart's,
As we know, the time of love and joy is approaching us all. I find it hard to accept that there will be certain ladies lonely this coming Valentines day. You will have seen me around the castle at times, and you may have been impressed.
I invite you to an evening with myself, whatever your status may be. Hopefully, you will be able to receive gifts this valentines if said date goes well.
I look forward to your eager replies,
Barney Stinson
Oh, he was so going to get laid.