If you're talking about a curb strap on a curb bit, then yes, it is required. If you are talking about a curb strap for a snaffle bit, then no, it is not required. Bosals do not require a curb strap.
If you are talking about a chin strap for the western hat, no, one is not required.
It is not required but I strongly recommend because with out it the bit has too much movement that may confuse the horse.
No It not a leverage bit. But can help but from passing threw mouth from the side
Yes. Sometime when getting checked, your helmet will pop up over your chin. The strap will help keep your helmet down. If you don't, the bottom of the mask can pop up and break your nose.
It is need which gives pleasure.
Usually, depending on your school, you need to buy your own mouthguard, cleats, cup/jock strap depending if you want to wear one. Also you may want to buy gloves, compression shorts/shirts, chin strap(if you don't like the one you get issued), and maybe your own pads/helment(you should be issued these) if you want to.
Chin implants are usually considered to be a form of cosmetic surgery. One who does not have a chin or one who has a very small chin might want a chin implant to improve on ones appearance and profile.
The Guitar strap come with the kit. I would say yes you do need it, unless you can hold up the guitar and play at the same time.
If you want to be insecure no
to break hymen
you need to see a doctor
The anal area of both mean and women has many nerve endings and blood flow meaning anal stimulation including anal intercourse can be very pleasurable. In men the prostate can be stimulated by having a woman use a strap-on dildo causing intense pleasure and even maale orgasm. You do not "need" to be gay to enjoy anal stimulation including being penetrated sexually by a strap-on. For a couple anal intercourse can be a very pleasurable and intimate act of both/either love and/or sex.
They need a strap-on (or I guess anything that fits).
for pleasure purposes.