NEIN.
DAS
IST
FORBODEN
Of course it's okay.
Now- I understand your situation as being quite precarious, especially with the whole Religious stigma basically telling you that a dick in the ass is a non-refundable ticket to the Inferno Express.
But that's complete bullshit.
As long as it doesn't come to harm others' wellbeing- people could and should do whatever they wish.
So you go ahead and suck that cock.
Suck it like a boss.
And tell anyone who disagrees with you to fuck themselves- or yourself- if they strike your fancy.
It may sound like I'm joking, but I'm quite serious; Fuck whomever you wish to fuck. Only you are the master of your dick- and only you shall direct it towards its path- be it the straight and narrow or down the bending road.