Data: Both men and women are happiest if they have one sexual partner

The last post showed that men with a minimum of one sexual partner in the past year are happier than men with nobody.  But does a man gain more happiness as the partners increase beyond one? Here's a graph showing mean happiness by partner number:

We see that mean happiness drops back down to the celibate level beyond one partner with the exception of the very small number of guys saying they had more than 100 partners.  

What about women? 

As with men, the happiest women had one partner last year. Celibates are less happy as are those with more partners. The mean happiness for the very small number of women with more than 100 partners is very low.