One of hundred and one strange quirks Tyson has is showering in his swimming trunks. He lifts the waistband to put soap on himself then lets the water run through to remove the soap from his body.
Tyson has never been comfortable in his own body so showers whilst wearing his trunks because this makes him feel covered; and safer because of that. Another part of it is paranoia, and possibly also Pyscho's influence in the public mind, of feeling unsafe when he can't always hear over the sound of water/having nowhere to run. Largely his OCD makes the shower a safe calming space for Tyson, but once he's already on edge it's hard to take comfort in that.
When he's in a hurry yet needs a shower - to settle his OCD or for genuine need - he won't waste the time doing this, but this is the norm for him. Something that has only been compounded by Bobby's need to jump under any running water. Tyson isn't embarrassed about being naked around his dogs, but if he can do anything to minimise the changes of Bobby's claws catching sensitive areas, he'll take it.
Tyson has never been comfortable in his own body so showers whilst wearing his trunks because this makes him feel covered; and safer because of that. Another part of it is paranoia, and possibly also Pyscho's influence in the public mind, of feeling unsafe when he can't always hear over the sound of water/having nowhere to run. Largely his OCD makes the shower a safe calming space for Tyson, but once he's already on edge it's hard to take comfort in that.
When he's in a hurry yet needs a shower - to settle his OCD or for genuine need - he won't waste the time doing this, but this is the norm for him. Something that has only been compounded by Bobby's need to jump under any running water. Tyson isn't embarrassed about being naked around his dogs, but if he can do anything to minimise the changes of Bobby's claws catching sensitive areas, he'll take it.