>>33245434 (OP)girls that have condomless sex off the table at all mention condoms as you two are taking your clothes off, so you can go a buy some if you don't have any
girls that might strongly prefer condoms ask for one when they see you hard after foreplay or blowjob or something
girls that would prefer a condom but are open to doing it without one usually ask you if you're not going to put on a condom as you're about to enter into her.
And then there are girls who never even mention condoms
those are also divided in three groups
the ones that ask you to finish outside as you two are starting to fuck raw
the ones that ask you to out it out as they see you reaching climax (the most of the times get mad if you finish inside but their anger subsides as you pay for her plan b)
and the ones that love when you creampie them.
this in my personal experience, I've fucked around more than 40 girls by now.