To the OP:
Do you really believe that trying this is "a bad idea" like you said?
It may be a challenge, but is trying it (and perhaps failing, or falling off the wagon once or twice and trying to get back on) worse than NOT trying it?
Somebody said that some of us will not have sex 100 more times in there lives ... I think that is exaggerating ... but maybe not? You have to be psyched that your wife would even be up for it! I give her a LOT of credit, and I would be crestfallen if I was her.
I am glad that so many on here have said that you were wrong and offered ideas about how it could improve your relationship. All the reasons you cited were lame.
Hurt your running? Fack you. You are 40 or close to it. Are you going to Indoor Masters Nationals? If not, then Fack OFF. Are you having sex regularly now? Doesn't it interfere with training? Yes, but you work around it right?
Kids in the house? Fack you. If your wife was up for the challenge and you are not ... I don't know what to say? Maybe she should give you the "not tonight" decline 100 times in a row? If you do it twice a week, that would be no sex for two years.
Do you realize you just turned down guaranteed sex for 100 days and at least 100 sessions? Fack you.
I am starting to hate you.