Personal ads - Looking for a keyholder or sub? discussion

I am a friendly mature man (49), clean-shaven, considered attractive and fit with an intelligent profession. I have some cuckoldry experience but no chastity background, looking for a long-term arrangement that hopefully leads to a genuine real-life commitment. I realize such relationships need a starting point, so I’m posting this ad to exchange ideas and hope to connect with someone. A lady from here mentioned I might be in the wrong spot since most of the women are involved, particularly those in the UK, but you can’t fault a sub for giving it a go.