For extra-silly sex...
 

A description of the mating habits of echidnas:

http://home.arcor.de/ktdykes/monotrem.htm#tachyglossus

You need to scroll down the page to the section entitled "A Tachy Tale of Sex".

" The female will be pleasured by a four-headed penis. As she has sex less than once a year, it's important to make a thorough job of it. The couple may be thus occupied for half-an-hour, but that would be quick for echidnas. This intimate union can last for three hours."

It's all good except for the less than once a year part.:D

I was wondering if anyone was going to read down that far. Should have known I could count on you, Lilith. ;)

Never boring are you lizzard man. :D

Yes, well, echidnas are my favorite mammals!

My eldest did a report on them once. Gladly he didn't get to the part about the love trains :D

Echindas are sooooo cute

awwww puggles! how cute!