Not everyone is willing to use condoms, so don’t assume that your partner will want to or have one to hand.
The only way to know is to talk about it. Agreeing to use a condom or not is also part of consenting to have sex.
All About Sex, Gender, and Gender Identity
What is the effect of masturbation while you are o
Things You Should (and Shouldn't) Do After Sex
Is it normal for girls to have sexual intercourse