A surprising plus side to being in chastity

For the last three weeks I’ve been wearing the HT nub, we’ve noticed that during our regular sex times my erection is noticeably firmer. For years she had to push my buttons to get me hard enough for penetration. Not so in these last three weeks. The other day she said “that’s the deepest you’ve been inside me in ages.” Now I have completed two months of denial using the honor method without this result, so it isn’t just about lacking orgasms. It might be psychological, but I doubt it. I believe that the total lack of sensation from wearing the nub is making me more sensitive…or something else. Maybe it’s the reduced frequency of erections? Has anyone else experienced similar things? I’ve never read anything like this happening before, so I’m curious. The nub hasn’t erased 20 years of age and medications, but it has knocked a good decade off my apparent youth.