As many of us are aware, alcohol often plays a significant role in sexual encounters and the moments that lead up to them. Research has found that a few drinks can make people feel more at ease, more attracted to others, and even feel more attractive themselves. However, alcohol use with sex — as with pretty much everything — can have major downsides. It often skews perceptions of desire, decreases sexual performance, and puts a serious damper on satisfaction. Here's what science says about the benefits and problems with mixing the two.