word to describe a person who catches the sexual overtone in a normal conversation

I know there is a word for it — I heard it when I was young. What is the word to describe a person who catches the sexual overtones in a normal (non-sexual) conversation?

Here's one example I have (I said this and then laughed because it was my comment and went over my own head at the time):

I was considering a name for a mobile dog grooming business. I thought 'Doggie Style' was great. Of course, the room full of my husband's friends laughed at me, telling me I'd never get approved for a license with that name. What word would I use to describe them?

Solution 1:

It's an idiom, not a word, but we sometimes say one's mind is in the gutter.

EDIT: As for specific words, one could say, "You have a dirty mind!" My computer's on-board thesaurus offered these synonyms for that sense of the word dirty:

indecent, obscene, rude, naughty, vulgar, smutty, coarse, crude, filthy, bawdy, suggestive, ribald, racy, salacious, risqué, offensive, off-color

Of those, I think suggestive, vulgar, smutty, risqué, and off-color perhaps fit most closely with what you're getting at.

As an aside, ELU had an earlier discussion about the word naughty.

Solution 2:

Dirty-minded:

obsessed by sex and tending to see the sexual or obscene potentialities in things