this is a long one, very sorry. TLDR: the consequences of cutting deeper are not worth the short-lived relief of satisfying an urge. consider why you feel the need to cut deeper, and consider other solutions to that feeling that don't involve the risk.
as someone who's covered in scars, has had transfusions, surgeries and eventually sepsis, my advice would be to consider why you want/feel the need to cut deeper. is it a question of validity? are you not getting the same relief? getting to the root of why you feel the urges is important because it can help you think of other solutions.
i started off thinking 'what if i just go deeper this one time'. once you cave to the spiral, the spiral consumes you. things can escalate far quicker than you think. quite frankly, if you're on this site, i can imagine you have enough problems without a myriad of longterm self-induced health issues.
i'm going to be very candid with you in this next part. read with caution.
the permanent damage people talk of is very real. its easy to trick yourself into thinking 'it won't happen to me' or 'i don't care' but to be blunt (no pun intended) any cut into the fatty layers and beyond can cause serious and potentially lifelong complications.
some personal examples: i've lost range of movement in both wrists which makes things such as door handles, writing, cooking, typing etc difficult and very painful; i have permanent nerve damage (shooting pains throughout my arms and legs, numbness, pins and needles) - the pain never stops; the scar tissue sometimes rips due to skin tension which is agonising; my scars regularly cut off circulation into my extremities; i will never walk the same again.
my body stopped healing at one point. i was getting stitches and staples 4-5 times a week minimum for a month straight and gave up seeking medical care. the wounds stayed open for 6 months and i had 7 infections, was eventually diagnosed with MRSA, sepsis and was hospitalised for 3 months. nearly lost my arm multiple times.
most of these injuries that have caused these issues were to sub cut fat and no deeper. some were deeper but the ones that gave me sepsis were no deeper than 'beans' as you called them.
just be careful. if you're adamant, use correct wound care. cover ALL injuries where you can see fat, and use steri-strips where possible. don't apply tea tree oil to injuries

. use antibiotic gels/creams. always use a clean blade and dispose of your blades safely. always seek medical attention if you're concerned, its better safe than sorry honestly.
sorry for writing so much, this is a topic i'm passionate about and i didn't see any point in mincing my words.