bondage within a tight closet space

I have a closet nook that’s just the right size for me, and I enjoy getting tied up in there whenever possible—it really gets my heart racing. Being both bisexual and submissive means I’m also quite fond of anal play; I own an impressive 10-inch dildo which is always part of my scenarios.

Typically, I position myself in a crouch with my hands secured overhead while the dildo is positioned beneath me. Because humiliation turns me on, I want to find a method that feels like being “forced” onto it, but I haven’t quite cracked the code yet, so any suggestions would be greatly appreciated:)

Additionally, I’d prefer to delay ejaculation for as long as possible since my horniness often causes me to untie myself prematurely. I’m looking for advice on how to stop that from happening.

Hope someone has some thoughts on my predicament:)