Do you really want to do something special for him?

Really?

How committed are you?

Wow. Okay. I guess you're ready to hear what I have to say then.

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Blowjobs. How comfortable are you with blowjobs? No experience at all? That's perfectly fine, you don't need any.

Seriously, I don't think anything else can beat blowjobs for birthday surprises. Just do the usual outing to dinner and a cheesy gift present to him wrapped in a birthday wrappings. Then when he reach home liao and go take shower, turn off the lights. When he comes out he'll be like "Wadafak why the lights are off..." THIS IS WHEN YOU POUNCE ON HIM, AGGRESSIVELY UNDRESS HIS PANTS AND MAKE HIM YOUR BOYTOY. THEN GO WITH THE FLOW, JUST REMEMBER TO SALIVATE ENOUGH FOR LUBRICATION. GOOD LUCK~!

Okay fine, I apologize. You said you wanted it to be special, NO? Well that's the most special bday gift I've got from a girl!

Seriously tho, virtually anything you do for a guy who has never celebrated his own birthday will make him happy. So quit worrying about ideas and just do whatever you wanna do. You could frickin bake him a shitty chocolate cake or give him a gentle kiss on his forehead or make him a jar of handfolded origami stars for all I care, it doesn't matter, it will be special to him.