In a recent Reddit thread, a person asked a very commonly fielded question: what’s something you didn’t know about sex until you did it yourself? While most of the answers were predictable, about foreplay and messiness and queefs and the like, one answer caught our attention:

Semen can strip a spray tan. Via user TLynn:

Here’s something I discovered recently, probably within the last year or so. Ladies (and gents) who spray tan or use a self-tanner like Bondi, be careful with where you put the semen! My ex-boyfriend and I realized that semen actually strips the tanner. He would usually get a towel, but sometimes I would just waddle to our bathroom and get cleaned up myself. We noticed, um, ‘stripes’ down part of my leg where it had run down on my way to the shower. We tested this out again, and sure enough, fresh semen will strip a fresh spray or self-tan.”

You heard it here first, guys — another great reason to use a condom: you don’t wanna mess up your girl’s spray tan!