Odd number is required when you give a Czech woman flowers, e.g. 1 flower and 3 flowers. Never give her 10 or 12 flowers! Please respect their culture. Also, a guy is supposed to pay on a date with a Czech girl because the Czech culture isn’t blue-pilled (yet). Remember to dress well as you want to show some respect (source: www.iDateAdvice.com).

It’s common for younger men to date older women in Czech Republic. Nobody knows what “cougar” means in their culture because the concept of “sugar momma” doesn’t exist there. Of course, you should always be a gentleman and remember to open doors and take coats for your Czech girlfriend at all times.

Unlike many western women who desperately want to get married, Czech beauties rarely talk about marriage when they are dating men. It is a man’s job to bring up topics such as engagement and marriage first. Of course, if you’ve decided to marry your Czech girl, you should tell her parents about your engagement when you are at their place for dinner. It’s a bit like asking for their permission and showing them that you can give their daughter a good, happy married life. But it doesn’t necessarily have to be really formal.
Source: https://idateadvice.com/dos-donts-dating-women-czech-republic