I would trust few self reported surveys and especially anything involving sexuality. And then across generations. But if there were a drop, I would suspect obes

I would trust few self reported surveys and especially anything involving sexuality. And then across generations. But if there were a drop, I would suspect obesity to be the main cause. After all, it may reduce the obese's interest in sex and potential partners interest in sex with the obese. Double whammy (no pun intended).