An article on CNN by sexuality counselor Ian Kerner notes several studies linking an abundance of money with "better sex" being reported.
One 2007 study said 63% of male millionaires and 88% of female millionaires say they enjoy better and more adventurous sex. Another 2009 study said women receive more joy from sex when the partner they "hook up" with is rich.
Kerner points to the fact that money can lessen the stress of everyday life that plagues many, leading to more enjoyable experiences all-around, not excluding sexual encounters. But don't be discouraged if you aren't wealthy (we aren't either). Another study says increasing sex from once a month to once a week creates a boost in happiness similar to making $50,000 more per year.