Sluis is a small town, but this small town had 4 or 5 sex shops...that I noticed. I'm not sure why these places are so numerous. Maybe, it's just to lure in the tourists? Should ask someone from the Netherlands.
Damme is recommended in the tourist bumpf, and there's a stern-wheeler ferry that takes you there - in season. We were there too early, and walked - it's about 6 km. There's a recreation trail along the canal.
An Action Photo! Riding around the town of Sluis. The picture is a bit blurry because the picture was taken while riding the bike.