Frequency definitely increases male stamina. I remember when I was dating this girl (between marriages) and she loved it all the time. Once we made love for 45 minutes before I "closed the deal." In the past couple years, however, it's been more like 45 seconds.
ANyhooo... keep on with what you feel comfortable with. He may be feeling a bit overwhelmed, but he's crazy if he's not lovin' every minute of it.
Hairdog, who wants to see his wife in her birthday thong.