I think if you brush it under the carpet now you will regret it op. I would definitely postpone the wedding if I were you. There is no sense in settling for an inadequate man or marriage even if people around you are pressuring you to think the inadequacies are small. Over time, through marriage, inadequacies grow. This is a pretty important set of his; disrespecting your boundaries, minimising your feelings and having dickhead mates that he sides with against you.
There are intellectual arguments (objectification and misogyny) and emotional ones (jealousy, insecurity) not sure why the emotional ones are being used to minimise the intellectual ones, they are related surely?
If you believe in monogamy and have agreed to be monogamous then it isn't beyond the realms of belief that prostitutes, strippers and porn might be considered infidelity (no it isn't the same as seeing someone you are attracted to at the beach because that isn't consumption for sexual excitement, it is just attraction) and that this might provoke jealousy. What each person considers infidelity to be is personal as are choices about monogamy. There is no 'making people (men) lie' by being 'unreasonable'. There is only feeling you are entitled to lie because you think you are more important or because you are a selfish coward who doesn't have much respect for your partner. If your beliefs differ you are each entitled to them and are incompatible.
The defence that porn, strippers, prostitutes are not a 'real' sexual experience and therefore are objectively unable to be called infidelity only holds water if you are saying a sexual services buying/consuming partner is fine to be sexually excited by a lack of connection with the reality of the person providing that sexual service. In this day and age if it is about sex then there are a myriad of ways to get it for free whoever you are, the excitement comes from the debasement of paying to objectify IMO, since there is really no need to pay for sex now. This is a problem when it comes to real sexual relationships because it shows a linking of sexual excitement to an active or passive lack of concern for the source of that excitement.
The insecurity that many partners feel comes from the objectification. It is the recognition that their partner is sexually excited by paying for a body. That that obviously puts their focus onto their own bodies in their minds, it leads to their own objectification of themselves and makes them feel as though things other than their bodies which make up themselves don't matter. This is a normal reaction if a bit misguided because often the people paying for the service have a madonna/whore complex or actually are just pathetic people (mates) pleasers who say one thing to their partners and another to their mates and never really enjoy anything particularly.
I wouldn't want to be with either although unfortunately I have discovered I am married to the latter. That's my bias if I have one.
Be very careful who you hitch your wagon to, especially if you have a daughter already. It is much harder to undo and gets harder and harder as the children get older. Don't settle for anything where marriage is concerned, don't do it unless it is absolutely right rather than a compromise. Postponing now might mean marrying this man later worked out better if that's the way you want to go. Doing it the way you propose simply says to him he is right that it isn't a big deal and it sets a precedent for your boundaries in the future; he doesn't need to respect them (or you) if you have them and neither do his mates.