Yes you certainly can😊
Apply just the same way you do under your arms. You'll find it helps big-time with chafing and rubbing too, for under breasts & thighs.
If you suffer from smelly feet you can apply the Woohoo on your feet too,
Please remember the anti-chafe properties might make the soles of your feet a little slippery so don't dive into your thongs and hit the dance floor right after applying.