Marrying a 2nd cousin is just too close for me. I think of all my 2nd cousins I grew-up with and it's a big NO to think of even just dating.
Most people who married in UK the last few hundred years were 2nd cousins or closer - they lived in smallish villages and were bound to be related somehow - I have traced marriages where both parties had the same surname and yes they were related, cousin marriages where the parents were also second cousins. The 7 sons of one of the cousin marriages all fought in WW1 and all returned safely.
FIL's uncle left the UK for the US to stay with his uncle in 1904 and ended up marrying his first
cousin once removed - their son was in the US Navy as a Chaplain and died aged 105