Very interesting and close to my heart at the moment - I am not having a major problem with the old erection, but it can soften quite a lot between some RO and OWO and getting the mac on. To be honest, I have always had a mental block on the first couple of times with a new woman in civvie life, back in the pre-marriage days of course so I think it is more nerves related.
I've also looked at the advice on wanking and abstinence to make the most of each punt - a real challenge as I have been addicted to porn most of my life whether I was getting any sex from the OH or not - obviously more so when I'm getting nothing.
As for leaving it 7 days or more - easy due to a lack of funds and finding a spot in the day when I won't arouse suspicions! Mind you, the last two punts were quite close together just because the first left me not quite as satisfied and the second happened to have a green light, was fairly local and a good price. Didn't have a problem there, apart from premature ejac. I'm determined to change my punting style, so after a short rest, I get the girl back into action and see if I can manage a second.