Man A: Physically, it feels incredible to be filled like that. It's a feeling most guys don't understand, because it's not the typical form of sex. Emotionally, it is a whole new type of power dynamic that we both love.
The shift in trust and submissiveness, and to be able to open that aspect of yourself to your partner is an extremely liberating feeling. When I get pegged, it's the exact same feelings you'd have during PIV sex, except I'm the one receiving. There is another dynamic in my relationship as well where I am a submissive and am locked in chastity.