feel the burn

verb2

1. •
   To feel the burning sensation arising in a muscle being intensely exercised; often used as an exhortation to extend oneself in physical exercise.

   • “Feel the burn!” Norm says, as Peoria lies over on a reverse lateral pulley system, ass up high, knees jerking back with the weight of fifty-five pounds. — 2014
2. •
   To feel the vaginal or anal pleasure or burn felt during sexual intercourse.