I feel that it's the less aggressive answer than "there's no delight greater than seeing you smothered and covered."

[Because, while it's true, he gets off of it so intensely only because she gets so turned on by making, and being covered by, messes.]

What I don't understand is why you'd go without underwear but you'd still wear a bra...

[As if to illustrate his point, the end of his tentacle flicks at her nipple.]

Just giving you a sample of what you'll have to put up with if you really commit to this.