Try without condom just to know how it feels

Chloe
My bf and l are planning to have sex without condom just to see how it feels. He said just to see how it feel for a minute then he will withdrawal then use condom and we gonna finish it. l trust him. But l wonder if guy will come that fast, or when l turned him on. His penis is wettt, is it sperm or its something else? Thank you so much plz help