When you are trying to sleep but your calf muscle decides to go into a spasm.
imgur.com category @LupusetVulpus
imgur.com category @Prophecytroll
TIL that only males have a muscle called "cremaster," which elevates the testes when contracted.
imgur.com category @un_sociable
imgur.com category @hungthick
[MF] Trying to show off your muscles to your bf so you can peg him
imgur.com category @Portuguese_420
The strongest muscle in proportion to its size in the human body is the tongue.
imgur.com category @beautiful_sausage
imgur.com category @beautiful_sausage
Not gonna move a muscle [F/F] [Twilight Sparkle] [Rainbow Dash] [Strapon]
imgur.com category @triiiplet