Balloon fetish (looners) involves sexual arousal related to balloons. This might include inflating balloons, watching them inflate, the sound/feel of balloons, or fantasies involving body inflation.
The appeal varies - some enjoy the visual aesthetic and colors, others the sounds of inflation and popping, and others enjoy the tactile experience. Some incorporate it into inflation fantasies.
The fetish community distinguishes between those who enjoy the balloons themselves and those interested in body inflation fantasy (often explored in art or roleplay rather than reality).
Safety is generally low-risk, though awareness of latex allergies is important if latex balloons are used.