How Can I get my butt to bruise more

Heavenly Angel • Engaged to Justice Hart 💕 TTC #1 ✨ Hoping for our 🌈 baby, 7.7.17 and 10.13.17

Weird question haha but my SO got my butt to bruise like crazy, we continued doing what we were doing every day and it lightened up, no new bruises. Any suggestions?