So, google does not allow you to put vibratords, dildos, etc on your site, but THEY can serve that kind of ads. WTF?
Are you sure it was adsense? I so not see the Adchoices logo. Give us the URL of the site you found it on to check otherwise your claims of double standard rings hollow.
Well, for example i had this add shown on http://www.redcafe.net/forums/transfer-forum.9/ It was wierd that there was no google icon, but i had tested on 2 different PCs to cinfrim this. Link was starting wit Here is where it would take you http://www.shopmania.rs/igracke-za-odrasle/p-prsten-za-penis-2035832?utm_ak=738230&utm_source=rtbhouse&utm_medium=retargeting&utm_campaign=rtbhouse-retargeting
Oh, just found that there is little icon in upper left that take you to http://www.rtbhouse.com/optout-page/?utm_source=optout_icon But they serving this by google ads?
They are using doubleclick bid manager and as such display other advertisers inventory including adsense in rotation; I even caught a Yahoo! publisher advert on one refresh of one of their pages. Your allegations of double standards by Google is unfounded and you should apologse to them.