Eldergays rent young hustler muscleboys to disrobe and pose for them, then worship their hawt unlined flesh while original cast recordings of the entire Sondheim canon play on the Victrola. The eldergay usually keeps his floral print caftan on, but takes periodic breaks for a ciggie and a sip of Dubonnet over ice.
In some circumstances, Julie London or Peggy Lee can be substituted for the show tunes. But only sometimes.
Hope that answers your question, OP.
R3 is correct, there is no such thing as "body workship." It's "muscle worship". Bodybuilders let guys (nothing to do with elderly) grope/touch/massage them. Is there sex involved? Depends on how you define "sex". There is no anal if that's what you mean.
OP, it's not just eldergays. Obese fugs love the muscle worship as well. Basically they "worship" men because they know that even if an escort is jacked up on Viagra, there's no possible way any one on earth can maintain a boner long enough to get past the fatty's many lard and skin drapes and towards an orifice.