my niche is on kamasutra topic, http://kamasutraloversguide.com/

will adsense approve this

As long as the ad fits within the Adwords guidelines (i.e. it isn't pretending to link to a different site and it isn't linking to a spam site), it should be fine. There are plenty of searches on Google for "kama sutra" (4 million worldwide monthly, according to the Keyword Tool), so a legitimate, relevant ad would simply go alongside those searches.

I suggest you read the Adsense guidelines.

They have been very strict so far on who they accept.

I've also heard that you must have a functioning privacy policy to get accepted.

Yep they should

We are not psychic.

my niche is on kamasutra topic, http://kamasutraloversguide.com/

will adsense approve this