In an adult male, on per rectal examination, the following structures can be felt anteriorly except-
The following structures can be palpated by the gloved index finger inserted into anal canal and rectum in the normal person:-

1. Anteriorly
i)   In males

Opposite terminal phalanx:- Contents of the rectovesical pouch, posterior surface of bladder, seminal vesicle, and ductus deferens.
Opposite middle phalanx :- Rectoprostatic fascia and prostate.
Opposite proximal phalanx:- Perineal body, urogenital diaphragm, and bulb of the penis.

ii)  In females

Opposite terminal phalanx:- Rectouterine pouch, vagina, and cervix.
Opposite middle phalanx :- Urogenital diaphragm and vagina.
Opposite proximal phalanx:- Perineal body, and lower part of the vagina.

2. Posteriorly

Sacrum, Coccyx, anococcygeal body and anorectal ring.

3. Laterally

Ischiorectal fossae and ischial spines.
Internal iliac lymph nodes
Bulb of the penis
Prostate
Seminal vesicle when enlarged