That is so true. My balls already hang lower just from holding my skin back with my other hand while jelqing. I would alternate between using two hand and one hand. I was doing this for about 3 months and it definitely hangs lower.
I was having sex with my gf the other day and she was putting her hand on my balls during it. Afterwards, I asked why she was touching them so much and she said the were smacking up against her more then usual. Hahah!