What annoys me is when meeting women my age the majority of available ones are usually single moms and are divorced. Or they are one of the few remaining single women in their circle of married friends. Those usually feel left out and want to steer quickly towards marriage with anybody they date that's even somewhat compatible. The peer pressure to get married from their friends is great.
Generally I date younger to avoid that. And most of my relationships are open ones as monogamous relationships seem like a gigantic waste of time to me. At this point in life why devote myself solely to one woman when there are eleventy billion other ones that would be just as awesome to meet and hang out with and get to know.