pop bottle

Don't know why some of my fishing buddies think this is so funny,
but thought I'd submit it for your judgement. Once upon a time
there was this ole man, we'll call him "Bud" who I struck up a conversation
with at a boat ramp one day, which resulted in a few fishing trips together.
On about the fourth or so trip, Bud had to go #1, and there was nowhere
convenient to go to the bank, so I offered him the use of the 1 liter
Mountain Dew bottle I kept wedged beside the gas tank - poor boy
port a potty - been using it for months, years? Do your business, pour
it over the side, wash bottle out and put back for next time. Anyway,
Bud accepts my offer, takes the bottle and turns his back to me, and
for at least 5 minutes straight, he grunts/groans fumbles in his pockets,
strange sounds coming from up there (I'm doing my best not to look)
FINALLY, he pours it over and hands it back without washing it out,
and says "Sorry, I had to cut the top out of your bottle, I'm (well endowed)"
Anyway, I'm saying to myself, GEEZ - I just meant for you to tinkle in it,
not MATE with it! My two main fishing buddies bring this up routinely
and get so tickled they can't talk... Is this really that funny? :confused:

I thought it was pretty funny myself!