Split website categories

I have read much of the literature on site submissions (as well as these threads) and feel I have a fairly unique question. I have developed a website that is similar to craigslist personal ads (similar but by no means identical and has a greater feature set as it is specialized around personal ads only).

My problem is the site implements both traditional personal ads and the so called "casual encounters" style ads. As such their are two obviously different categories that my website might apply to. One would be in the adult section the other in the general directory. After reading the literature it seems as though I can in fact apply separately (the ad types are separated into two sub directories on my site so they would in fact be different URLs) but I am am nervous that because of the overlap it might be rejected by one or both. Should I apply to just the adult section. Should I apply to both?

Thank you for your feedback.

Suggest your site to the single best category.
Do not submit related sites.
If you site has adult content, submit to Adult/