It isnt that I’m small or useless in bed – but being male once we blow our load our sex drive does drop. Women deserve better! What better way than to be kept in chastity, constantly wanting to please ones Mistress with tongue, hands, toys, etc – and amuse her by accepting chastity, cbt, etc.
Cuckoldry is an obvious extension of this – while my cock should be locked to keep me focussed, and while there are plenty of toys which can be substituted – but why should she not be able to obtain a real cock elsewhere too?