Take away his phone.
Well at this age they don't even know what "dating" is.
And for texting... kids get into LEGAL trouble for that too... and for sending photos/nudity in e-mails too or posting it online.... does your son have an e-mail account and an online account for anything? Because, besides his phone... these are other avenues... of ways teens... communicate.
Perhaps, you and he, should attend a cyber safety class or workshop. Some schools even have that for families.... look into it or any community workshops on it.
At this age, they don't have the maturity to be 'wise' about their conduct.... even in hindsight. So... parents have to take the lead in it.
The human brain... is not even fully developed until 26 years old.
A mere 10 year old... does not have the full maturity to know the ramifications of things... their actions etc.
What if, that girl's Parents... got all pissed off your son was making out with their Daughter???? What a DRAMA that would be... and trouble for you... his parents. For example....
Lots of scenarios... can happen.
How would you feel... if YOU were the Mom of that girl, for example????
Exploration with the opposite sex... occurs. Even at his 10 year old age.
But how will others view that... ie: her parents????
I am sure... he does not even know... about "sex" nor what can happen....
Many things for him to realize... and to learn about.
He is young. Not wise.
What does his Dad think??? As a couple, you and your Husband should sit down with him, and have a "talk" about it.
AND he can get in trouble in school too... as the previous poster said....
there is so much liability to things too, nowadays.... good or bad.
Educate him, clearly... on the facts of texting/e-mail/online behavior/how treat great girls/his body/his urges/biology etc. It is TIME... to have a TALK with him... a very succinct talk... and your rules... and about boundaries... and for in the future... HOW to treat girls... etc.
Do not mince words.
He needs to understand.... fully... how to manage his "urges."
AND he NEEDS to know.... the FULL RAMIFICATIONS of things and his actions. Bluntly.
all the best,
Susan