Is it normal certain sounds make me think of unrelated things?

Organs make me think about burgers. Maybe it's just because to me, it sounds like organs are making this kind of "burrrg" sound whenever they play, but that's just one example. Saxophones make me think about butts sometimes - I just imagine some butt swaggering around arrogantly whenever I hear the sound a sax makes (sometimes, I imagine that they're being played by butts). Just walking, sentient butts.