All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
The narration which you referred to in the question is narrated by Jaabir and reported by Al-Bukhari, Muslim, At-Tirmithi, An-Nasaa'ee, Ahmad and others . The narration is also reported with the wording "…so that you may laugh with her and she may laugh with you''. As regards the meaning of ''…so that you may play with her and she may play with you.'', Imaam An-Nawawi said: ''This means playing, and the majority of the theologians explained the Prophetic expression by the usual play, and this view is supported by the expression ''…so that you may laugh with her and she may laugh with you''. [End of quote].
Therefore, what is meant by playing, is joking and laughing with each other and being kind to each other, and this may include some foreplay. However, some scholars stated that it may refer to the saliva, as Imaam An-Nawawi said. Ibn Hajar said regarding the above meaning: "It refers to sucking her tongue and lips, and this happens when playing with one's wife and kissing her, so this meaning is very possible."
Therefore, according to the above statement, the meaning would be that it refers to foreplaying.
As regards the second narration which the questioner referred to, it is reported by At-Tirmithi, Ibn Maajah, Ahmad and others . The meaning of the Prophetic expression "or playing with one's wife" refers to joking and courteousness, meaning that he plays with his wife by treating her according to her mental understanding in order to soften her heart and keep good marital relationship with her.
With regard to why the Prophet stressed playing with a virgin and not with a matron (deflowered woman), then this is an urge to marry the virgin. Ibn Hajar said that this narration is reported by Ibn Maajah with the following wording: ''I advise you to marry virgin women, as they speak in a pleasant way and can give birth to many children.''
Furthermore, Al-Munaawi said when interpreting the above expression: "The matron could be affectionately attached to the first husband and she would not have complete love (for her second husband) at the contrary of a virgin woman."
Allaah Knows best.