Well then we go on with the ideas for slave-fashion.
I've modified a par of Levis, to accommodate the demand for a pair of jeans, that can be locked, with or without 'toys' inside..!
A good piece of ad vise, by the way. If you've got a sub, who's going to
travel some distance, dressed up in this kind of pants, you might want to lock
the pants, in a way, that allows for him/her to get the jeans off, without the
necessity of cutting either pants or padlock.
Get yourself a padlock, with a 'digit-code', and see if the padlock can be
locked without showing the correct code.
If you i.e. set the code to 911 and then is able to lock the padlock, showing
the digits 000, you've got a nice option, in sending the padlock to your sub,
showing 000, telling him/her to lock it into place, having the full range of
1000 different combinations to choose from.
Now, should your sub be unable to get to you in time, (stuff happens IRL), it's
no problem, to tell your sub the correct code, and the padlock ill be opened in
seconds, without ruining anything, and without other tools than the ever-present
cell-phone !

I've purchased a pair of jeans (Levis) 'button-down', and replaced the buttons
with loops of line...

The loops I've sown on, onto the inside of the part, usually carrying the
buttons, and pulled the loops through the openings left by the removed buttons.
I've removed the buttons by the use of a pair of pincers, biting on under the
'backsides' of the buttons.

Pull the loops through the button holes,

-and 'sow' them, as you see here,

until you get to the last loop, in the 'fly'...

The last loop, you treat just like the others, until you pull it back
through the same buttonhole....

Then you pull the loop up, and over the loop to the left of the button
(to the right, if you're using a pair of ladies jeans *G*)

The loop left of the button, is now pulled through the buttonhole.

Then you simply button the lining, just as usual. The buttonhole may be a little
more tight, than you are used to, due to the loop, but it usually works quite
good.

Finally you lock the two visible loops together, and that's the end of the
possibilities of escape...

Locked with the 'digit-padlock'.
-and then 'just for the record'... I've sown the front-pockets closed, in order to remove the option of 'grabbing on to the toys inside the pants..!

If you're able to see the sowing (on the outside) you're definitely too
close..*LOL*