When talking to a potential future spouse about marriage, is it allowed to ask them some sex-related questions?

When picking a woman/man for marriage, there are 4 categories as seen through an Islamic perspective: - Religion - Beauty - Lineage - Money My question is concerned with the beauty aspect. Hence, when talking to a man/woman about marriage (of course talking while acknowledging Islamic boundaries), is it allowed to ask them some sex-related questions? If yes, what are the limits, if any, to one asking such questions? Such questions can involve talks about STDs, body parts/shape, etc etc.