It should have been a perfect night -- two girls on his arm, dinner at a top restaurant -- so why was Valentine's Day such a let down for Hugh Hefner?

The 86-year-old Playboy founder had to leave dinner early on Tuesday night, and RadarOnline.com has exclusively learned what was behind his early departure from Valentino's restaurant.

Playboy founder Hugh Hefner hosted his annual Midsummer Night’s Dream party Saturday night and RadarOnline.com has all the pictures from the super sexy summer fling.

With new girlfriends Anna Sophia Berglun and Shera Berchard on his arm, Hef invited Hollwood heavyweights to the Playboy Mansion for a night of debauchery.  

PHOTOS: Hugh Hefner’s Sexy Summer Fling

Captain America star Chris Evans partied with bad boy Jamie Kennedy, while Glee’s Mark Salling and Max Adler were on hand to watch the hundreds of gorgeous women dressed in their “favorite sleepwear and lingerie” party until the early hours of the morning.