So, I'm thinking that the 11yr old has asked the 7yr old to do 'something' and, I dunno, but I guess this might be touching his (11yr old)s penis? Perfectly natural for the 11yr old to have a pleasurable erection, but inappropriate to ask the 7yr old to facilitate the outcome.
So, op, time for That Talk, or, if their father is around, time for him to do it.
For the record, my 10yr old dd, one breakfast-time, v. Recently (her dads been away for a few weeks) said, conversationally-like, " mum, sometimes I rub my front bottom" me, gulping on my tea, not expecting this so soon..."why?" .."dunno, it just feels nice"..
DS, 8, keeps chomping away at his toast, hadn't a clue, obv.
Oh, I told her "yes, I remember(?!) it feels nice as our body starts to grow up(she's got little buds growing) but it's a private thing, best keep it for when you're in bed, OK "
Best I could do, with school bags to be packed and the school bus approaching
Really wasn't expecting that!