Sliding out a sly one

I'm sliding out a crafty one,
I'm being most discrete.
I'll slope off, slyly, when it's done
and leave it on your seat.
It's good to leave one's scent behind,
a funny thing to do,
especially when, last night, you've dined,
on pungent Vindaloo.

I'm sliding out a sneaky one,
a pungent little gift.
It really is a lot of fun
to leave one in a lift.
It's vital, in a closed in space,
to make sure that it's silent,
and get out once you've done, in case,
your helpless prey turn violent.

I'm sliding out a sly one,
It's leaving quite a pong.
I'm careful that it doesn't run
in case it all goes wrong.
It has to be exactly right,
I don't hold back, nor push,
for then I'd run the risk it might
all come out in a gush.