Dear Dr. Phil,

I was watching my next door neighbor's wife sunbathing topless from my bedroom window.

As I was jerking off I turned to notice my wife just standing there, arms folded ... watching me.

Is she a pervert?

Some of the thought-proving findings:

• Men had better sex (greater arousal and pleasure, with fewer problems) when it was with their relationship partner. The researchers say this may be due to older men with erection difficulties being more comfortable with established partners.
• Women, on the other hand, reported more trouble with arousal and lubrication if their sexual partners were people they were in relationships with.

Oh, and one other thing, "friends with benefits" aren't just for young people. Nearly 17 percent of men aged 50-59 reported their last sexual experience was with a friend, compared with 13 percent for those 18-24. The trend was reversed for women, with 16 percent of younger ones, aged 18-24, saying their last sexual experience was with a friend, compared with nearly 10 percent for those aged 50-59.

For the full results, see the paper provocatively titled (to sexologists), "An Event-Level Analysis of the Sexual Characteristics and Composition Among Adults Ages 18 to 59: Results from National  Probability Sample in the United States" in the Journal of Sexual Medicine.