Supposed Male G-Spot?

Greetings guys and gals. So I have done a little bit of research and heard of this so called male G spot inside the butt. Sounds pretty awesome, so I've tried several times to stimulate it myself, but have had no success.

I'm probably being stupid, but was wondering if there's anything obvious I should be doing/feeling. I feel like I've explored everywhere (so to speak haha) with my middle finger and it doesn't really feel like anything. Apologies for being a newbie haha.

Any help would be appreciated. Thanks.

If you search the forum for P-spot you should be able to find quite a lot of useful information on how to stimulate it.

http://www.lovehoney.co.uk/sex-toys/male-sex-toys/buyers-guide/bad-boy-aneros-prostate-massagers-stimulation/