As a foreword, it all depends on agreement between dominant and submissive. I'll respond as if I was explaining my view to my submissive, thus things I would consider cheating.
Long story short, anything that makes my submissive more desperate and horny is welcome, unless I explicitly forbid it, so:
Without cumming:
1. Is penis stimulation through the cage cheating?
no
2. Is using a vibrator/e-stim cheating?
yes, because it's too big risk of them cumming
3. Is ball play cheating?
no
4. Is anal cheating?
yes because it releases fluid from the prostate - something a submissive must earn! And I don't want them to have any relief without permission
With cumming:
5. Is penis stimulation through the cage cheating?
yes - no orgasms without permission. Ever.
6. Is using a vibrator/e-stim cheating?
yes - no orgasms without permission. Ever.
7. Is ball play cheating?
yes - no orgasms without permission. Ever.
8. Is anal cheating?
yes - no orgasms without permission. Ever.
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Male, switch, prefers sensual domination
Like: Denial, light pain, forced orgasms, teasing, cbt, humiliation
Might do: Cum eating, mild pain, anal, mild selfbondage, piss
Limits: Public, Family, Illegal, Friends, Permanent, scat, absurd long term denial, crossdressing, gross
Last orgasm: 2020/03/05 [full orgasm]
Toys