It’s so hard to ‘post orgasm torture’ yourself. It really needs some evil fucker of a partner who wants to make you scream.
So getting ‘less sensitive’ isn’t really the point. It’s finding a way to not be able to stop it and having to endure the over stimulation.
There are a couple of DIY options.
You can get or tie a wand harness, then restrain your hands to make it even better.
Source: http://nicepussybruh.tumblr.com
Image @fryingpanhandz
A butterfly vibe might do it, although they don’t tend to give quite enough pressure
But a rabbit vibe is probably a better bet, ideally tied in or held in with panties – there are some good ones in the Lovehoney Vibe Sale
The sentence “It really needs some evil fucker of a partner who wants to make you scream.” has me fucking weak