These kind of ads are easy to do if the client/brand is ok with cheeky humor. You have to be creative with headlines and terminology. For example, let's say you're targeting moms who are experiencing dryness. Your ad copy could look something like this: "The kids are in bed, the husband's ready to go, and it's drier than the Sahara desert down there. With XYZ product that doesn't have to be the case anymore. " That's obviously a really rough draft of an idea that could use polishing. Sustain Natural has some great ads for organic tampons, condoms, lube, etc. You should check them out.