Have you ever left work early, or not went in at all to see your girl? A lot of ladies only work during the day and us dudes who don't do shift work may not have a choice. Do Tell.
I know That I have frequently and will be tomorrow afternoon.
I liked using 1/2 days at work, you go to work just as normal (for SO reasons). Usually its not a big deal to take off half a day because your able to deal with your emails and any fires in the morning and have fun in the afternoon. Come home just like normal on time.
You could use the old dentist/doctor/parole officer rolleyes appointment excuses once in a while. For me I put so much time in that they weren't concerned me taking the odd half day off here and there. But it only works if you work insane hours for free (Sometimes I was first one there and last to go, be there Sat, Sun. Travel, etc.).