Yeah, I am usually the same way. Feet can be be pretty nasty, hands too unless washed really well. I mean you have to think about, hands touch everything, and feet... well even with socks on, if you walk around barefoot in your home you are picking up god knows what, especially when you have dogs that go in and out. Your shoes are probably the dirtiest things in your home, even more so than your toilet. You walk around in public bathrooms, restaurants, etc. and then track that stuff into your house. Since having a baby, we have a strict "no shoes" policy in the house and we shampoo and steam clean our carpets regularly. LOL... I am a bit of a germaphobe! Still, any foot play in our house comes RIGHT after a good shower and foot scrubbing, and it doesn't happen often.
Come to think, if you over think things like I do, you will start thinking about how clean your partner's genitals are. Sure, most of us wash our hands AFTER going to the restroom, but how many do BEFORE? Hands being as dirty as they are, if you touch your genitals to wipe or in a man's case to hold his penis and you haven't washed before doing so... eewwww or they touch the toilet seat to put it up THEN touch their penis... you see where I am going with this? If you shower EVERY time before you have sex or oral sex, you would be relatively safe, but who does that every time? I have learned that I need not think about germs as much as I do, or I would never have spontaneous sex at all!
Sorry for the rant! I know you weren't saying you have a foot phobia because of the germs exactly, but I got started and couldn't stop. I know a lot of people that HATE feet. I used to be one of them, but everything is different with my man. I do things with him I used to think were gross and disgusting in some way, or degrading. It's all about perspective I guess.