My DP has never had a relationship and is is mid-30's. I have been married and have children. Feels like now he has sexual and relationship experience he will go to either do what normal teenagers do and see lots of different people or just use me to make mistakes and learn how to be a boyfriend and then go on to perfect it with someone else. Could it really last if he's NEVER done this before??
do you have low-esteem (thinking that your DP is using you as an 'experiment')?!
Is there any reason you feel he would prefer to think about his next conquest, rather than enjoying his time with you.
It sounds like a journey towards devaluing his feelings for you (poor him) - unless of course, he has already indicated that's how he feels, in which case maybe you should question why you would want to be in the relationship that makes you feel that way.
I expected this post to be about a Frankenstein-minded male who was intent on making you over into his fantasy woman with big boobs and an even bigger booty.
Some folk mate for life without having experienced any other sexual relationships and have no inclination to do so. Others become like kids let loose in a sweet shop enthused at the prospect of having multiple sexual partners after having tasted the forbidden fruit, so to speak.
You're better placed than any here to judge whether he's likely to use you to gain experience before launching himself into other women as a fully accomplished man of the world and some, including myself, would say that this is a risk that comes with the territory of experienced female/inexperienced male and vice versa.
Are your dc teenagers? If so, the time to worry will be when he buys a crate of hooch strong lager and joins them on the village rec.