Rookie Scribe
Varies a lot, depends a lot on how horny I am and when I last climaxed. If it has been a while then I am more likely to cum quickly. 15 minutes would be quite good going, 30 minutes very special. Changing position can also very the degree of stimulation and that can help a lot when you are keeping things going for your lady, which we all know is important. It is very important to me to please my lady and I am much happier if she climaxes at least once before I do.
Varies a lot, depending on how busy or tired I am. Maybe twice a week, depending on the opportunities. I prefer to orgasm late at night because it does slow you down, it is not natural to the male metabolism to be full of energy straight after orgasm. Women can do it, men can't so easily, something that is often overlooked. Slower and unhurried build up to orgasm is much better ... 
It is an opportunity to know my lover really intimately, it is very special, very trusting. Every woman should receive great cunnilingus on a very regular basis. It is one of the ways we guys have that we really love and admire our partner and want to give her complete pleasure and satisfaction ...