"Weird" is very subjective. One person's weird is another person's normal. In fact, ageplay is one of the most common BDSM fetish. I see it all the time.

My list of fetishes include: Nazi, strap-on/pegging, an*l, facef***ing (him), deepthroating, bondage, candle wax (him), blindfolding (him), nipple torture...I'm sure I have a few more that I can think of.