1. If this is how you work out: Angela Radulescu / CC BY-NC-SA http://2.0 / Flickr: walkingthedeepfield 2. If your tee's a choking hazard during your non-Greco-Roman, but definitely full-contact workout. Stig Andersen / CC BY-SA http://2.0 / Flickr: stigster Alan / CC BY http://2.0 / Flickr: adavey 3. If this is what your sports bra looks like: Richard Masoner / Cyclelicious / CC BY-SA http://2.0 / flic.kr 4. If your freewheelin' hobo antics have sadly left you devoid of even one tee. Clay Gilliland / CC BY-SA http://2.0 / Flickr: 26781577@N07 A bed without wheels > your lats, bruh. 5. If your workout is as a first responder and your shirt is the only suitable material left for tourniquets. Secretive Ireland / CC BY http://2.0 / flic.kr Or if it's on fire. Definitely take your shirt off if it's on fire. 6. If you're a paper doll and you and your paper clothes will melt when you start sweating. darwin Bell / CC BY-NC http://2.0 / Flickr: darwinbell I.e., if your workout is jumping the shark, eeeeyyyyyyyyyy. 7. If you've escaped these mortal coils and wearing a shirt while exercising would scare everyone even more than the fact that you're exercising. Klearchos Kapoutsis / CC BY http://2.0 / Flickr: klearchos 8. If your workouts have subtly taught you that if you don't run until your heart explodes, you run the risk of being turned into glue or French hamburger. photophilde / CC BY-SA http://2.0 / Flickr: photophilde 9. If your shirt gets caught in a wood chipper and you'll start moonlighting as ground beef if you don't take it off. Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF PolyGram Filmed Entertainment / soulfulsock.tumblr.com 10. If you crafted your workout garments from fresh meat and the delicious smells have summoned hungry carnivores that will eat you unless you feed them your shirt. Frederick M. Brown / Getty Images 11. If you're having an allergic reaction to your shirt that's causing your entire torso to hemorrhage blood and the only way to stop it is to remove the shirt. Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF Summit Entertainment / twilightgifs.tumblr.com 12. If you are D'angelo*. Frank Micelotta / Getty Images *Note that this says "If you are D'Angelo," not "If you have abs like D'Angelo." If you're, like, Bradley, a fraternity member from Pennsylvania who thinks it's too hot out for a shirt when it hits 70 degrees, remind yourself that you're not D'Angelo, sexy R&B singer who takes his shirt off and makes everything hotter at all of the degrees. 13. Or if your 😉😉workout😉😉 happens here*: NRVLiving Real Estate / CC BY http://2.0 / Flickr: nrvlivingphotos *If your daily workout is actually consensual sex behind closed doors. I don't believe you, but if it really is, then, sure, you don't really need a shirt during your workout.