Just a small note on this. Some years ago I did some lifestyle videos and I was required to submit a form and pay a fee to get a classification due to one piece of content. We have ways to be classed as exempt but our laws state that any media that *may* be deemed for mature audiences must be classified officially.
I am not even sure whether 1) it's applicable to your game content or 2) required in your own country but it might be worth a look checking the law before determining your own rating.
NOTE: This was in Australia.
AKA SisterMatic (Steam)
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Sys 1: i7-4770 (3.5)/16Gb/128 SSD/3Tb/970gtx/2 x 23, 1 x 27 LCD - Sys 2: i7/8Gb/670gtx/1.5Tb/1 x 23 LCD - Sys 3: Amd Quad/8Gb/645gtx/1Tb/30" LCD