Is it normal to ask random strangers on the internet if [x] is normal?

That depends.

Do you want "normality" defined as "normal to the average American man" or "normal to the average person on this planet"? The broader your scope, the less accurate your answers will get (especially considering cultural practices).

Self-selection bias and sampling bias are practically impossible to eliminate on a domain like this. Your overwhelming majority of respondents will be well off enough to possess their own electronic devices and must be at least proficient in English. You can't really force people to answer whether or not certain behaviours are normal, so self-selection bias is always going to be a factor.

Not normal.

And then you can also read other posts and weigh up what's said and what bits might be even remotely true and what you DO come to realize is that there's a hell of a lot of weird thinking in the world and feel a whole lot better about your own little worries. That's how it works for me.

normal is a social construction that in the end is meaningless

Did you know hamsters die after sex. Well it did with me.