If do do it without a condom don't then put it in the vagina as this can cause an infection..
I have found most women have tried anal and would do it again.
As long as you use lots of lubricant and he is gentle you will be ok..
and I have found that for some strange reason it is men more than women who want to do it. There aren't a lot of nerve endings in the anus, unlike the vagina, so the pleasure to be had is of a fairly limited kind for females.
Unfortunately many young people, and I am one of them, feel so invincible that even if you've had sex ed, in the heat of the moment you think - i'll be fine - then when something bad happens, infection, pregnancy, you'd chop off your arms and legs just to rewind and go back to that moment and use a condom but of course you can't change the past.