Obscured intimate close-up of underwear and nearby skin, cropped so tightly that the person and setting are mostly unavailable. Likely next moment: the clothing or camera angle changes while the scene remains close.
ふにゃつん2 @funyatsun2

ちんぽ撫で回して隅々まで匂い嗅いだら興奮したらしく跨って擦りつけてきた