Paizuri is a subcategory of hentai that involves 'breast sex', also known in
America and other parts of the world (slang) as 'titty
fucking', 'tit fucking', etc.
When Paizuri first became a big thing in hentai, it was most commonplace for the character giving paizuri to the second
party to have large or huge breasts. However, in the past few years or so, this has become more varied. In many types of hentai, women of all breast sizes can give paizuri.
Some varieties: Double paizuri (involving two women performing it on a single
penis), multi paizuri (same as double but involving more women), clothed paizuri, futa (she-male) paizuri, etc...
Eric: I picked up a few new Vocaloid doujins from Sakura-
Con a few days ago.
Jay: Any good?
Eric: Yeah, a lot of paizuri.
Jay:
Teh titz!