love-seat
Da lap or stomach of the "underneath" partner in a couple during intercourse, where the "upper" person is "sitting" or "riding" on the lower one.
To avoid injury or distress to someone who's acting as a "love-seat", the "sitting" person should consider (1) how sturdy his "seat" partner is, and (2) how big/bulky/heavy HE HIMSELF is, and therefore whether he might be excessively squashing his romantic partner.
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