everything has some capacitance.which raises an interesting point about the gate charge of MOSFETs in switching power supplies.
(
Moon Girl Technologies horrendous beanbag,
Wed 27 Jan 2010, 23:08,
archived)
and PAL and NTSCNTSC (Never The Same Color) bolloxed the colour on US TVs due the base emittter capacitance variation of transistors changing with DC offset, PAL (Pricey And Late) overcame this with an expensive modification
(
lord bofingham,
Wed 27 Jan 2010, 23:16,
archived)