I believe they call it…

RAW DOGGING

Raw Dogging is a term generally used for having sexual intercourse with a girl without the presence of a condom/ female dam.

To successfully raw dog a babe, you need to get a boner (some college kids may call it an erection, or a hardened dinky), then after making sure she is fairly wet/lubed up, you get into a position where you can easily, and comfortably insert your firm penis into her wet/lubed vagina. The first insertion is sadly considered a “raw dog”, then after you make at least three full insertions, and pull outs, you’ve successfully raw dogged that babe. This enables you to brag to your lunch table about how you practice “raw dogging”.

This may seem very enticing, though it can be risky, perhaps evensketchy. Some things that increase the “sketch” are your partner being a nasty fucking skank, or if she is on her period…and bleeding a lot.
(from urbandictionary.com)