Does it bother you if someone pulls your head/hair during oral?

I hooked up with a male friend a while ago and I noticed that he seemed to like to pull my hair and push my head when I gave him a blowjob. He never forcibly held me down though, and it seemed as though he was trying to resist the urge at first but it overcame him (fortunately I can deepthroat). I will also say that he is a respectful person in general and always returns the favour.  I was suprised when he first did this but then I realized that it was a huge turn on for me. 
I've heard it's the opposite for a lot of ladies. How do you feel about it? 

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