You're using the Restrained Life Viewer.

By default (but you can remove this option), LULU Signature Cuffs implement RLV's "notouch" feature, which simulates your being locked.

You can only touch stuff within 1.5m from your avie. The way SL works - this 1.5m is from "center" to "center" - and what you see onscreen might look like it's 1.5m, but if say it's a large object (e.g. a very tall door), its center is quite far from you - it's not the horizontal distance between you.

Don't like it? Starting from cuffs v2.0.4, your owner can turn off this RLV feature by going to your cuff menu ( say "/1c" while cuffs are worn, then go to "other" etc. and click "RLV Options"). If you've got older cuffs, just get them updated.