OK, this may be a nice way to advertsie your site on Tumblr/twitter etc. Whay it is is a GIF of a dildo with your message/URL/whatever on being used. There is a demo below.
The cost is $10 for a gif - payment via paypal. Just tell me the message and where you want to use the gif (will dictate the size) All the contact details are below in the sig.
Can make it quicker animation and a smaller image if you wish