I saw this questionnaire (with some modifications) by @DrKink in the German forum and find it interesting.
1. Who has seen your butthole?
[X] yourself
[X] Mother
[ ] Father
[ ] Siblings
[X] partner
[X] best friend
During doctor play and descovering male body as adolescents
[X] Friends/buddies
During games, like thruth or dare, strip poker, my best friend's sisters and some gf's did see it
[X] Doctor, nurse
Doctor and psychologist who witnessed the complete exam
[ ] Strangers
2. Are you embarrassed when people see your butthole? Other emotions?
During exams, being in stirrups, spread wide open, you feel open and accessible, but as that is the intention, you can't do a lot about it ...
3. Is the skin around your butt hole a different color? What color? (feel free to private message me a picture of yours)
normal colour
4. Do you shave the hair around your buttocks if you have hair?
From time to time, yes
5. What has already been in your butthole?
[ ] Fingers during sex
My partner's fingers during sex, but not really inside.
[X] Hands of the doctor
finger of doctor as well as play doctor
[ ] Penis during sex
[ ] own finger
[ ] Vibrator / dildo
[ ] plug
[ ] other sex toys: _____
[X] suppositories
During childhood
[ ] Enema
[X] medical equipment:
Ultrasound probe
[ ] other: handle of a screwdriver, end of a broomstick (being pushed to take it in during strip poker game)
during play exam, prostate stimulator (didn't work that good though.
6. Do you feel uncomfortable when you put something in your butthole?
Not really, but depends on width when entering, so might be uncomfortable, such as the end of the broomstick