The artist Jeryn likes to depict mature guys getting restrained and tortured. Many of the images are playful, while some others are hardcore. The artist has granted permission for these works to be shared here:

You can see more artwork by Jeryn at these locations:

• DeviantArt (a free site but registration is required to see the NSFW content)
• Blogspot
• Patreon (2 bucks per month to see all his exclusive content)

Thanks to Jeryn for sharing the images above, which are used with permission