I'm pretty sure Woohooer is the mod that deals with any attraction, I can't say I've noticed it altering it to be less, but it might possibly give it more reason, I tend to get messages the person thinks my sims are hot rather than the rich or skill ones.
To be honest for me the attraction isn't the problem it's the mail and phone calls but Shimrod over at simsasylum.com has a mod that stops the calls and gifts or makes them fewer so they are less annoying, I use that in non challenge games and it works very well, you can still send a love letter if you wish and I've even got a reply but you don't get spammed by the unsolicited ones.
I've found after the initial attraction message, which seems to prod a sim into flirting, apart from the moodlet unless a sim actually has a trait making them more likely to flirt nothing happens, and if they do have one they probably would have flirted anyway. My main sims are always eternally faithful despite one of them being flirty and the other a hopeless romantic and I can honestly say the attraction system has not changed that one bit, it just means they get date calls and love letters a lot.
