"Job quitting and breaking up both carry very large, positive, and statistically significant coefficients at six months. Going on a diet is positive and statistically significant at two months, but has a small and insignificant impact by six months. "

Guy breaks up with girl Goes gym (2 months) Guy finds girl (6 months)

I'm sure we have these chemicals which effect emotion to be overtly opportunistic about life around periods with new sexual partners to encourage reproduction. But I'm just an alien