So while playing my sims3 game with allow breakup on, I notice that divorce seems to happen so much and so often. I want divorce to happen but I don't want it to happen a lot. I was wondering if there might be a setting or something that I can do so that divorces do not happen very often. I heard that maybe Woohooer has something to do with it but I'm not sure. Is there anything that I can do to stop divorce from happening so often?

Perhaps fiddle around a bit with the SP settings might work too? The romance options for example. There's the 'Maximum relationship to force breakup' setting which in my current save is set to -90 (don't think I've touched it) so perhaps it can be set to -95 or even closer to -100. There's also the cooldown setting 'partner to breakup' which if set to a higher number of days might make a difference.

Under flirt options there are cooldown settings for between partners and flirts too, which might affect things if the main reason for the divorces are because of cheating. If that's the case, for Woohooer, lowering jealousy might help I'm thinking.

Another approach to take, which is more long-term in its effect, is to increase the Liking Gates for Partnership and Marriage (this is also an SP thing, not Woohooer) so that sims won't be so quick to couple up without getting to know their partners better first. I believe, though I can't prove it, that doing so tends to lead to more stable long-term relationships as it takes them a bit longer to form. Some worlds though, looking at you Bridgeport, just seem more conducive to unstable relationships among the premades.

NRaas > SP > General Options > Options: Romance > Partnership Liking Gate and Marriage Liking Gate > (defaults are 40 and 75 respectively, perhaps try something like 65 and 90).

Of course, this assumes NRaas StoryProgression is in play. If you are using EA's built in story progression, then unfortunately things are more random and there are no such controls.

Where Woohooer comes in is more governing where sims are likely or unlikely to flirt and woohoo, not so much partner and break up. Although one can and sometimes does lead to the other, that's not always necessarily the case.

I second increasing the Liking Gates as Igazor suggested. I might see one divorce per generation, and I have mine set at 60 for partnership and 85 for marriage. My Liking Gate for divorce actually makes divorce more likely (-75 instead of the default -90), but since it almost never happens, I think what Igazor says makes sense; the more they like each other before marriage, the more likely they stay together.

(Probably because it's less likely that sims with negative traits will choose mean interactions with their high-relationship partners. Depending on traits, it might only take one mean interaction to start a fight that will completely destroy a relationship.)

But if you don't want to use SP, controlling flirting with Woohooer should reduce the divorce rate, at least a little. I had a save where nobody flirted with anyone except their partners, and everybody lived happily ever after, to a kind of boring extent.