My sister is calling me (21) weird for having a 17 year old girlfriend. Also she tells me I was a creep for having a 15 year old GF when I was 17 (This isn't illegal in my country). We argued for a while about how this isn't strange or unnatural but she wasn't having any of it. I pointed out her hypocrisy as she says it's completely natural and rational for her to want a rich boyfriend and she admits she isn't really bothered about boys her age. Yet my natural attraction women 2-4 years younger is weird...

Why is this? I refuse to believe these are her genuine beliefs and I believe she's been conditioned or influenced to think this...