LOL!! It doesn't make you gay sucking you OWN penis...
I've heard of people do it, but I myself can't...
I don't think you'r doing any harm to your back, if you're flexible enough to do it, then you're fine!
Odi et amo. Quare id faciam, fortasse requiris.
Nescio, sed fieri sentio et excrucior.
~Harrie's proud brother!~