i think adult domains are a little hard to monetise , but i would suggest you a few
1. ds
2. parked for us/uk traffic
3. sedo for international traffic
for me where i got 0.01-0.02 cent per click at namedrive and sedo i got 0.05 at parked so it all depend keep on shifting the parking company with different keywords like
adult , adult portal , adult personal etc
thanks