enough to cause devastation of food supplies, thus causing the population to collapse.

No. A man does not have to be inside for a woman to get pregnant. There is such thing as a pregnant virgin. If a man ejaculates on a woman, there is a chance that the sperm will travel (even through clothes) and end up in the woman's vagina and fertilizing an egg, causing the woman to get pregnant.

You seduce a male vampire causing the woman to be pregnant with a vampire child or you could have a male sim marry a woman vampire and get her pregnant to cause the same results.

Being circumcised or uncircumcised does not play a role in how long a man lasts in bed.

The differences are that an uncircumcised penis is more sensitive, causing more pleasure for the woman. However it's easier for infections to develop.

A circumcised penis has less chance of developing infections but is less sensitive hence causing less pleasure for a woman.

Each month an egg is released in a woman's womb. If this egg is not fertilized by a sperm by the end of that month the egg will die off and be realeased through the vagina with the surrounding tissue, thus causing a woman to have a period.