I have explored quite a lot of the erotic and not so erotic delights here.
For massage, there are two Thai places I know of that openly offer erotic by default with HE but also full service if you pay 140-50Euros.
1. Thai LoveClub21 which is near RLD.
External Link/Members Only - Both times I've been there the service was ok but girls were pretty unremarkable and quite old mostly. You could be luckier.
2. Sweet Thai massage - more obscure location but had a VERY nice girl there, who very easily converted me to a full service as she was so cute in look and character. The other woman in reception area was old and not so hottie. It's got a clean and quite pleasant vibe in the ample rooms. QUite near the Oost area.
External Link/Members Only3. Chinese places who always offer if you say it's your second visit ( all with zero atmosphere, but still good massages sometimes ). One on Geldersekade near Niewemarkt, I cannot find on the map. Always offer special finish. Most of the ones open late beyond 10pm do. But not very erotic at all, mechanical experience.
Finally a 'legit' Thai place called Nirvana, in De Pijp area. Sometimes offer of HE. But very seldom. Good massages generally though. Once I had a full on 69 with a girl there, and we kissed deep.... seemed like a real pull. Should've got her number.