I can't help but think.... If a man can't expect a BJ on his birthday, what does that say about birthday spankings? "...And one to grow on."
Just a different perspective on the point that blowjobs should not be expected. My wife told me that on many occasions before we met (and probably in our early days too!) she would give a man a blowjob to avoid having full sex with him. She did this on those occasions when she obviously liked a man but wasn't 100% sure if she wanted to go 'all the way' with him. So in my wife's case, she didn't see a blowjob as more intimate than fucking but as a satisfying alternative for both of them; she was happy because she'd not done something that she may later regret and he was happy for the obvious reason. I hope you all agree that there's logic in there somewhere!!!
The only logic in there is that she couldn't get pregnant that way. The rest is mostly subjective. There is not really an explicit logical statement or convincing argument that blowjobs should be expected more so than just getting laid.