Someone who studies and specializes in the male organ.
A doctor that checks up on the testicles and has to look at someone's dick for eg diseases (STD's), or misshapes.
When you dress in a Santa costume and play the part in order to satisfy your partners Christmas fantasy of fucking good ole St. Nick
Me : Ho Ho Ho !!!!And what do you want for Christmas???
Her : come over here Santa and give me your peppermint stick... I've been so naughty.
Me: oh yeah.... here comes St. Dickolus
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