So Ive had three serious (greater than 6 months) relationships in my 42 (m) years in this life. In all three relationships I have discovered that my SO has cheated on me with atleast one other partner.

Recently discovered my wife (42) had an affair a couple years ago which broke me a little but we are now working through it seeing as it was a long time ago. Been together 12 years and married 4.

Now question is.... Is this a reflection of my own sexual performance or have I just managed to be unlucky and it's more about her than me. Always seems to be some excuse like they were drunk, or moment of weakness, career progression etc. but are these just excuses....

DM open