I bleed every time my boyfriend fingers me. He has clean hands and very short nails. Whats the deal?

I bleed every time my boyfriend fingers me. He always makes sure to wash his hands and he always has very short nails, so I'm not assuming its a cut or anything of the sort. I'm on Depo, so I don't even have a regular menstrual cycle. We are also not sexually active. Does anyone have a reason as to why I would bleed a good amount every time?I bleed every time my boyfriend fingers me. He has clean hands and very short nails. Whats the deal?
possibilities: 1). you hymen is not fully broken and every time he is damaging remains of hymen; 2), you have vaginal infections - check bot belowI bleed every time my boyfriend fingers me. He has clean hands and very short nails. Whats the deal?
Could be he's too rough and/or you aren't wet enough.
Gremlins in your uterus.