Information from WebMD says that new dads often experience a decrease in sexual desire and attraction to the mothers of their new babies. What was a surprise to researchers were the reasons behind the change. It wasn't a result in guys not being interested in sex.

Instead, just plain old fatigue and stress were the main factors in dad's interest in getting it on. That actually applied to both the men and women in the study.

Time constraints were also blamed as both a deterrent and an aphrodisiac by those surveyed. About 40 percent cited lack of time as one of their top three deterrents to sexual desire, while about 28 percent cited it as one of their top three drivers of desire.

Sometimes the brief window of opportunity created by limited limited time, was as big a turn on as anything else.