Men were much more attracted to their female friends than vice versa.

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Privacy was paramount—for example, imagine the fallout if two friends learned that one—and only one—had unspoken romantic feelings for the other throughout their relationship.

In order to ensure honest responses, the researchers not only followed standard protocols regarding anonymity and confidentiality, but also required both friends to agree—verbally, and in front of each other—to refrain from discussing the study, even after they had left the testing facility.

Both men and women were equally attracted to romantically involved opposite-sex friends and those who were single; “hot” friends were hot and “not” friends were not, regardless of their relationship status.

However, men and women differed in the extent to which they saw attached friends as potential romantic partners.

Pregnancy happens when a man’s sperm fertilises a woman’s egg, which can happen even if you’ve not had sexual intercourse (penetration).

During sex, semen is ejaculated from the man’s penis into the woman’s vagina.It’s possible for you to get pregnant without having sexual intercourse if, for example: The risk of getting pregnant in this way is very low because sperm can only live for a short time outside of the body.However, if you’re not planning a pregnancy, it’s important to know that it’s possible to get pregnant in this way.As soon as the penis is erect, before the man ejaculates, a liquid called pre-ejaculate is produced. Men have no control over the production of this liquid.A woman's ovaries release one or more eggs (ovulation) 12-16 days before her next period.Yes, although the risk of getting pregnant in this way is very low.