Anyone who has ever been on a stag do will tell you, that you go through a real range of emotions from beginning to end.
You experience great fun and camaraderie of course, but usually there comes a stage when the alcohol leads to stupid decisions, and a moment of reflection and self-pity takes over.
Man United legend Roy Keane can still recall one incident when the 'Bacardi Breezers' got the better of him, and he ended up doing something he regretted.
Speaking on the latest episode of Stick to Football The former Ireland captain shuddered at the the whole concept of stag dos, before telling his tale of woe.
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[I hate] stag and hen dos. When they’re walking through the airport with learner signs on – really? And pictures of their boyfriend that they’re getting married to, and all their friends have matching t-shirts. What are you doing?"
“Every week was a stag [at Manchester United]. I’ve been on one stag in Dublin. I had a moment where I thought ‘Is that really it?’.
"We had a drinking morning with lots of Bacardi Breezers, and in the afternoon we went back to get changed. I walked past the rooms at 4pm in the afternoon and I was struggling.
"You know when people leave their food outside their door – I sat down, there was an old bowl of soup and I had it! It was an out-of-body experience going 'what are you doing?' I went back and got changed and went back out. I just thought 'has it come to this?'
"When you go to these stags, and the guy who got married, you just knew they weren't going to stay married. Everyone gets divorced. Knew they weren't going to stay together. I was right, they didn't stay together, of course. Like most people."
Keane has since gave up drinking, and when he remembers stories like this one, he is probably glad that he made that decision.