Sex sells, right? Not always. Think about those adverts you used to see with 'SEX!' in big letters at the top, and then 'Got your attention? Now buy our insurance policyzzzzz' in smaller text underneath. Did you ever buy the insurance? Nope.
Unfortunate then that an increasing number of mobile games are adopting a similar policy, taking a fairly boring game that you wouldn't normally want and draping half-nekkid ladies over it to arouse your attention. Often, the results aren't much fun. Recent examples include Sexy Babes: Wild Waterslides, and Sexy Soccer.