Polygamy dating make marriage stronger

My husband and I are both open minded. We have married for two years, the routine intimacy seems less passion and active. So, we decide to try the polygamy dating. We get to know this date on a tinder for threesomes dating site, people on there are all like threesome hookup, they said polygamy dating can make people have stronger attachment. So, we are going to find a third one join us to have a happy threesome hookup.