Penis extenders or sleeves to prevent ejaculation during intercourse

Hi everyone, I’m usually kept denied and in chastity by my girlfriend. The issue is that she likes having sex with me almost as much as she likes denying me. We do have intercourse, but I often only last a few minutes before needing to cum (it’s not easy when you’ve been waiting for a month). Even though I give her oral sex daily, she still craves the feeling of real penetration. So, I need something that lets me fuck my girlfriend for a good while without ejaculating. Strap-ons feel too artificial to me, so I’m curious if there are penis sleeves or extenders that block pleasure enough during thrusting? I came across this: … 82107.aspx Has anyone used something similar? Can such a device ensure my girlfriend gets her sexual satisfaction without me losing mine?