Its a good place to start. I dont like being finished off, so if the blowjob is the entire encounter, I'd take it... But I'd rather get naked and sweaty.
It's almost like eating pussy in my mind. I don't see me saying "hey baby, lets go upstairs and I'll tongue you off." I've done that, but its rare. My finely tuned pussy radar can detect females getting out of a shower.
...So, why would head be any different? Its foreplay. Although, dont get me wrong. I'm not a friggin idiot, if thats whats on the menu, I'm there.
Oh, and 69 rules. If you cant walk and chew gum, not my problem.