Marriage can be great and children just wonderful. BUT if you have a strong sex drive then expect that yours will outlast that of your spouse especially after the menopause. That is when punting enters the equation.
Then it is a matter of understanding what you are doing within the context of your marriage and whether you can reconcile yourself to it. Takes a bit of time to come to terms with. If you can then punt away. If not you will only hurt yourself and most likely your spouse. Not good.
OK . I've been reading a book recently over the past few months on and off by michelle langley called "Womens Infidelity" which explains why this very often happens, but mainly in women in their 30's and 40's. Her theory is that women are as promiscous as what men are but society makes them behave in a way they naturely wouldn't, i.e. they get married have children and "then what", they seemingly want more and that is sex on the side with ANYONE but their husbands.
OK it may seem a bit far feteched but it's what happend here and it all fits as well as some to other people i know. Have a read and make up your own mind's of course you don't have to fork out for the book just put "michelle langley pdf " into google and you can download it parts one and two.
It's very interesting reading all the same even if you disagree, but it will go a way to understanding female behaviour. OK i know thats far feteched as no mortal male can do that!, but have a look and make up your own minds.
There are plenty of websites such as Mens health of poor sods trying to find out why their women have given up on their sex lives and despite all the attention they give them thery still seem to be no further forward and these are marridges where they were at it like "rabbits" and now once a month or less is consided by the female spouse as aequate:-(
And more to the point plenty of us on here seeking that lady to fill the missing moments;!.