May it be worth having another question before survey starts: when was the survey taker last sexually active (to orgasm) to see how/if selection changes?
Thank you for your support and interest in the project - and of course this thoughtful input.
We have had hours of discussions on how many "metadata" we ask for. The two main reasons for the fact that we decided on just gender and age are on the one hand the more data you ask for, the less people will take the time and effort to start the survey (so we wanted to make the "barrier" for participation as minimal as possible). On the other hand, this study has been designed completely in alignment to approvals by the ethics committee of our university and they demanded us to gather as little as possible "personal" data of the participants.
I hope that explanation helps a little bit. Thank you for your support!
Understandable but I'd argue that it's quite an important attribute - as it's known that post orgasm people's sexual drive/interest is/can be greatly reduced - and therefore what is stimulating will be different. I'd highly recommend having that additional field (that isn't personally identifying data either which is where I assume the concern is) if you run this experiment again - which I hope you do with better load times, things like different torso sizes - as proportion of breasts to torso size has an impact, etc. Still kudos to you for the work.