Sex Advice: Safe sex is an equal opportunities situation
Carrying condoms in your purse doesn't make you promiscuous, it simply makes you smart. be sensible and be prepared for anything.
Both you and the person you're seeing should always carry condoms. It's a shared responsibility. If you're single, it doesn't mean you sleep around; it means you're sensible and prepared for anything.
If you're married with six kids, on the Pill and produce the condom, it's a little fishy but even then (especially then), prudent. If he does give you a withering 'What sort of girl are you?' look when you grab one, put it back in your handbag, put your clothes on and leave.