Darth InVader
When I was younger I got a gift of one of the lightsabers from Star Wars. It’s telescopic and extends to full length. So I decided, whilst I was seriously horny to take the smallest part out, lube it up and proceed to jam it up my ass. Managed to find the sweet spot and while jacking it came absolute buckets. Felt slightly guilty after it. But when I think about it now my dick is diamond hard. May the force be with you.