I've had sex in baths in Istanbul and Izmir, but not in Germany. There was nothing dangerous-feeling about it, but discretion is an absolute requirement.
You can't compare Turkish Islamic culture (until the recent fundie movements) with the Puritan crazies among Saudi Salafis or the pestiferous radical Shia.
Being an American who is taken for a straight man probably kept double-scrutiny away, but it also obviously attracted the guys who were there with sex on their minds. Oral and manual - I didn't feel comfortable about anal in that context. But anal is what they wanted. I invited a couple of the guys to my place at different time. Wonderful people, lovely sense of humor and intellectual to boot.
It's just my bias and theirs, probably, but my German relatives insist that the bulk of Turkish immigrants are to be avoided and not to be trusted, and that their form of Islam is usually "low," meaning more radical. Except for university people.