A religion that is a type of nature worship. Pussy worshipers see the pussy or vulva as the source of all life and all meaning full pleasure. They have regular orgies and practice the art of vulva massage. they also compose poetry etc. about the pussy and see it as the symbol of the mother goddess. It often overlaps with other pagan religions.
He's into pussy worship.
This is attaching an almost sacred reverence for the vagina, at the expense of real sex for the guy. So he's always horny.
In a sense, all guys worship pussy. But real pussy worship means a wussy getting on his knees and praying to the bearded clam, being mostly horny and begging for sex, etc.
John is really into pussy worship. That's why his knees are always dirty, he has tuna breath, and his dick is always hard and dripping ....