Looking for ideas for payback on a..... um.... friend, yes a friend.

I’m not looking to do anything illegal. I’m just looking to make his life a little less comfortable.

I've already subscribed him to a questionable male pictorial publication and it is currently being delivered to his employment address.

I’ve sent a pair of woman’s previously worn perfumed undergarments to his house along with a VERY steamy note. The note was written by the wearee of the undergarment explaining what a wonderful time they had last time he visited her city. BTW he is married...

I'm running out of thoughtful ideas...