Depends on whether I get to keep my shirt on.

Alex: "Thanks for coming over."
Friend: "No problem."
A: "Want a drink?"
F: "Sure."
*Alex mixes cocktails*
F: "So, I brought my swimsuit...where's the hot tub?"
*Alex hands over drink*
A: "Actually...it's my new large whirlpool bathtub. Come have a look."
F: "Hmm. You know, now I remember, I have somewhere to be...."

See. Completely weird. But if we change it to:

Alex: "Thanks for coming over."
Friend: "No problem."
A: "Want a drink?"
F: "Sure."
*Alex mixes cocktails*
F: "So, I brought my swimsuit...where's the hot tub?"
*Alex hands over drink*
A: "Actually...we had it built inside so we could enjoy it in the rain, isn't it nice?"
F: "Cool...and with a conveniently located toilet!"
A: "Yeah, that's for puking when we party too hard."

Somehow no longer weird to people.

Well, do you chlorinate your bathtub?

If I did, would that make inviting people over to lounge with me in my bathtub any less weird?

But then chlorination does not deal with any of my issues either.

Actually, slightly more weird.

Although making it slightly less weird would be if your tub were secluded from the actual commode in your bathroom. Say, with the toilet behind a door as in some bathrooms, or if the room were large enough that one could say of the tub that it's "clear on the other side". Still a little weird, but if it were an awesome jacuzzi tub and it's not right next to a toilet, then I might be down (well, maybe not with Alex).

When we discover an irrational spot in Alex's psyche, it's hard for me to leave it alone...

How do you feel about swimming in the ocean?

Do you get squeamish about breathing the air of others, too? What about places that get nothing but air conditioning? Some places have filters, some don't. To me it's the same as being in a swimming pool (or possibly worse, at least you get chlorine in a pool).

You're hardly alone in your need for personal space. (Get it?) Hot tubs tend to deflate my personal bubble...

In general I'm not a huge fan of swimming as an activity. I can swim just fine, but I don't find it to be fun. Scuba's good, though.

But no problem swimming in the ocean. Or in small ponds. Or leach filled laked. I'd rather swim in a lake filled with algae, frog eggs, and deer piss than sit in a hot tub with sloughing human skin.

No, people breathing near me isn't really a problem. Though if they're so close that I'm conscious of them breathing on me, they're already inside the acceptable radius. (And this is preferences, not phobia. I don't run screaming from crowded BART trains where crowd surfing is the only way in and I have been in hot tubs with people.)

Finally, there are many irrational spots in my psyche (preferring License to Drive over Adventures in Babysitting is, at core, an irrational process), I just try to be aware of them and not pass them off as objectively correct.

I worked with a guy who told me he would never store his food in a used refrigerator. He could not believe I wasn't buying a new fridge when I moved into this house when there was already one here.

Now I am re-thinking lakes and hot tubs. Though I am not likely to swim in a lake anyway, since they are usually so icy. Brr.