<human>: So the embarrassing initial detail. I had an operation called a pilonidal sinus excision. Basically an ingrown hair at the top of my butt crack was causing pus and blood to pool in a little pocket there, causing discomfort and a horrible discharge every few days when it would burst out. The doctor basically cuts the infection out and let's your body heal itself closed.

Weeks later and the wound is finally healed and I can get along to my basketball game with my friends. The game gets a bit physical because we may be friends but we are all competitive. Comes down to the last play and I fail to block a three point shot on the buzzer, feel a little twinge down there but the humiliation of the loss pushes it out of my mind.

Hit the showers then change into my spare gray sweats to catch the bus home. 

My friends get off at their stop and I change busses soon after. Waiting for the next bus,  get a few weird stares from others nearby. Not sure why. Get on the bus, more stares as I sit down. 

So I'm walking home from the bus stop and people are actively crossing to the other side to get away from me. I notice a faint metallic smell seeming to emanate from my body as well. I twist my head to look at my backside finally remembering that little twinge of pain. My gray sweats are blood red all down from my butt to my legs. I am bleeding from the top of my asshole but to everyone seeing me, it must look like I've just taken a big cock up the Arse and have torn it open. They'll be telling their friends about the gay guy's walk of shame,  I'm sure.

Can you summarize the given text in a few sentences?
<bot>: Re opened a wound playing ball. Caught a bus while looking like I was bleeding from the ass into my gray sweats.