OCD paradox, sexual stuff, etc

i have read ocd on and off in the past and noticed something interesting in some people that apparently have it. in general, ocd can occur with depression, and if anything, it is rather common in ocd, at least in one site i had looked at, it had put down major depressive disorder as the most common commorbidity, followed by personality disorders, either the pd were most common commorbidity or the depression.

anyways, i was wondering how people with ocd can do the things they do, yet also have depression at the same time? i mean, the depression will bring the individual down in energy, motivation, etc, yet they still do things like taking showers 3 times a day or compulsively vacuuming the house?

also, i was wondering if the example im giving would be considered ocd or more of a fetish or paraphilia? i know in another thread, we werent really supposed to talk about these things, but i havent really gotten help with any therapists about this so i thought it would be better to post online in the forums with people that may be able to relate to it or at least give an explanation for it, i even tried bringing it up in group therapy one time but the leader running the group kept telling me to limit what i shared.

the example is that i have what i refer to as somewhat a ritual or way of self pleasure that involves me not having my feet get in contact with certain things when im walking barefoot in the house or in general, like for instance, i see people walk on mats barefoot and stuff, but for me, that really affects my brain, because i want my feet to not get into contact with that mat because i want to press my face up against my feet later on when masturbating, and don't want that the mat to be in the picture when im masturbating, because it affects pleasure.

would this be ocd or something else? the thing is, it seems to mostly have to do with my feet and self pleasure or physiological part, although i did remember going to someone's house who had pets and was really bothered with all the hair everywhere, especially that it got on my clothes and tried really hard to get all that crap of me before i went home, i was wearing shoes btw, which actually brings up another question.

how do people with ocd have pets? wouldnt this be hell for them? it makes no sense if they are ocd about washing their hands, yet they have pets and essences of hair everywhere else? for example, i would be fine having pets that lived outside the house and would be ok being around them, but i just dont want the essence ( hair ) carried with me when i go in my room and have cat or dog hair on my hands, feet, etc.

the thing is, i like to smell my feet and masturbate when they are sweaty or stinky after the day while fantasizing about women and their feet i've seen in the past or doing so online at the same time because it's a certain way, they been in my clean socks i wore the last day and nothing else's essence really was part of it, but if for example, i have to wear someone elses shoe or something that i dont like when i played soccer in the past once and i didnt have cleats, then it affects me masturbating next time because i have that thought and affects the quality and pleasure of masturbating.

im a straight male btw. would the things i undergoe be more of a foot fetish, ocd, paraphilia and / or something else?