Main points in their party program seem to be lowering the age to star in porn from 18 to 16 and allowing kids from age 12 and up to have voluntary sex. They also want an independent organisation to screen child pornography for unwilling actors.
I think whatever 2 consenting adults are up to is between them and I sincerely hope this party will get nowhere and be outlawed. Almost makes me ashamed to be living in the same country.
Just in case you're wondering, the wikipedia article on this distasteful practice can be found here.