With an account on rubber.social you'll be able to follow people on any Mastodon server and beyond.
Trouble logging in?
Be pervy, be kind. A kink, gear, and BDSM-friendly Mastodon instance.
Approval required for sign-up for anti-spam purposes. Don't need much, just enough to show you're not a spammer. Just a simple "I like rubber" works, even!