someone who samples their own odor

A jack off buddy (from 'cum' /'come', meaning 'semen', and 'companion'); a friend that you get together with for sessions of solo or mutual masturbation
Variant of: cumpanion (from 'companion' & 'cum'); jack off buddy & wank bud & JO buddy
Similar to: fuck buddy

Someone who goes home and smells their socks to confirm how "hard they worked"

the kind of guy who comes home from a long day of work, his feet have been sweating all day, his socks are ripe with the pungent aroma of stale milk and wet leather, and after he finally sits down and takes his socks off, but just before he throws them in the hamper, he takes a quick sniff to sample his odors.

Noun
1. One who, after a long day of work, sniffs their socks to sample their odors.
2. Bill O' Rilley.